NaCl CaCl2 Research Articles

Ab-initio molecular dynamics calculation on microstructures and thermophysical properties of NaCl–CaCl2–MgCl2 for concentrating solar power

NaCl–CaCl2–MgCl2 ternary molten salt is a potential material for thermal transfer and storage applications at high temperatures. In the present work, its microstructures and thermophysical properties over a wide operating temperature range were investigated by using ab-initio molecular dynamics simulations. An approach-to-equilibrium molecular dynamics method was used to calculate the thermal conductivity of molten salts. The local coordination structures and mechanisms of their temperature dependence were investigated. It can be found that the dominant bonding interactions are between cation-chlorine ion pairs, which can be considered as bridges connecting the local structures in liquids. The interaction between ions decreases with the increase of temperature as distances of ion clusters get larger. The thermophysical properties were evaluated in detail from 703 to 1173 K, showing a good accordance with the experimental data. A detailed relationship between operating temperature, microstructure, and thermophysical properties has been studied. The results suggest that the changes in thermodynamic properties with increasing temperature are caused by the variations of microstructures, in terms of the distances and bonding characteristics of ions.

Controllable conversion of rice husks to Si/C and SiC/C composites in molten salts

Abstract Direct conversion of biomass to functional materials is an ideal solution to relieve challenges in environmental and energy sustainability. We herein demonstrate a molten salt thermoelectrolysis of rice husks (RHs) mainly consisting of organic mass and biosilica to achieve high-efficiency and upgraded utilization of both Si and C in RHs. By coupling pyrolysis of organic mass with electrochemical reduction of silica in molten salts, the thermoelectrolysis of RHs in molten CaCl2–NaCl at 800 °C refines the RHs and acid-leached RHs to SiC nanowire/C (SiC-NW/C) and Si nanoparticle/C (Si-NP/C), respectively. The present study highlights the molten salt thermoelectrolysis for reclamation of biomass wastes in an affordable and controllable manner.

Experimental Kinetic Analysis of Potassium Extraction from Ultrapotassic Syenite Using NaCl-CaCl2 Salt Mixture.

This kinetic experimental analysis reports on the application of a eutectic NaCl–CaCl2 salt system for the extraction of potassium from ultrapotassic microsyenite. The reaction parameters, time, temperature, salt composition, and salt to ore ratio, were systematically analyzed. It was found that a salt mixture increases the potassium cation extraction in comparison with using either pure NaCl or pure CaCl2. It was also found that adding CaCl2 into pure NaCl has a considerably stronger effect on increasing the potassium recovery than adding NaCl to pure CaCl2. The salt as a melting agent offers a reduction in the reaction temperature due to its lower melting temperature when compared to pure salts (NaCl or CaCl2). Approximately 70% of K+ in the deposit was extracted at 650 °C. Different characteristic methods have been used to understand the reaction mechanism of the salt mixture and ore, as well as to qualify and quantify the end product mineral phases.

Age and genesis of the W-Bi-Cu-F (Au) Nui Phao deposit, Northeast Vietnam: Constrains from U-Pb and Ar-Ar geochronology, fluid inclusions study, S-O isotope systematic and scheelite geochemistry

Northeast Vietnam comprises several tectonic units, which host number of metallic deposits of different types from orogenic gold to intrusion hosted PGE deposits. The Lo Gam domain being part of the NE Vietnam, hosts the Lang Vai gold district, a several Pb–Zn deposits, and the recently discovered super-large W-Bi-Cu-F (Au) Nui Phao deposit. The Nui Phao deposit is 87.9 Mt at 0.19% WO3, 7.95% CaF2, 0.18% Cu, 0.19 g/t Au, and 0.09% Bi, while the measured resource is 25.1 Mt at 0.25% WO3, 8.4% CaF2, 0.23% Cu, 0.26 g/t Au, and 0.108% Bi. The Nui Phao deposit is a very interesting object for research due to location of the orebodies between of two granite massifs of the Cretaceous (Da Lien) and Triassic (Nui Phao) age. Consequently, the temporal and genetic relationships of mineralization with a certain magmatic events are unclear. Here we present mineralogical, compositional, and geochronological data of the Nui Phao deposit in conjunction with physical-chemical researches to understand the ore genesis and its genetic link to a certain magmatic events. According to our observations, at least three different mineral associations are distinguished at the Nui Phao deposit, which include greisens, skarns, and quartz-sulfide ore. Skarn and sulfide ore mineral assemblages generally contain abundant scheelite associated with pyrrhotite, chalcopyrite, and native bismuth. The greisens consist of fluorite, muscovite, and rare molybdenite. The results of fluid inclusions study indicate that at the Nui Phao deposit the initial ore-forming fluid was represented by the reduced (CO2-CH4)–H2O–NaCl(CaCl2) system characterized by high temperatures and moderate salinities. The fluid boiling is the dominant mechanism for ore deposition at the Nui Phao deposit. Relatively homogeneous isotopic compositions of oxygen (δ18OH2O = +6.73 to +9.24‰) and sulfur (δ34S = +1.6 to +3.5‰) that closely correspond to magmatic source, suggest that the ore-forming fluid was generated from cooling granite pluton without contribution meteoric water. The systematic studies of scheelite composition show that ΣREE contents decrease from early to late scheelite generations, which suggest gradual REE depletion of the ore-forming fluid without significant fractionation between LREE, MREE, and HREE. The REEs of scheelite are mainly controlled by the substitution mechanisms Ca2++W6+ ↔ REE3+ + Nb5+ and 3Ca2+ = 2REE3+ + □(Ca). By combining REE features, Y/Ho ratios and other characteristics of the Nui Phao deposit, we propose a single magmatic source for hydrothermal ore-firming fluids without fluid mixing; a significantly contribution of material during fluid/rock interaction is also unlikely. The combination of mineralogical and geochemical features as well as complex studies of the formation conditions allowed us to conclude that gold at the Nui Phao deposit occur as impurities in the native bismuth. The ages of the Da Lien and Nui Phao granite massifs and the Nui Phao deposit have been estimated to be ca. 84 Ma (Ar-Ar), 244 Ma (U-Pb) and ca. 85 Ma (Ar-Ar), respectively, indicating a genetic relationship between the mineralization and the Cretaceous magmatic event.

Solid−liquid phase equilibria of the quinary system containing lithium, sodium, calcium, strontium and chloride ions at 273.15 K and 101.325 kPa

The solid–liquid phase equilibria of systems LiCl–NaCl–CaCl2–SrCl2–H2O and CaCl2–SrCl2–H2O at 273.15 K and 0.1 MPa were investigated with the isothermal equilibrium method. The solid–liquid equilibrium phase diagrams were constructed with the experimental solubilities. The phase diagram in the ternary system consists of one univariant solubility curve saturated with solid solution (Ca,Sr)Cl2·6H2O, and one crystallization field of the solid solution. There are three invariant points, seven isothermal univariant curves, and five crystallization regions saturated with NaCl corresponding to (Ca,Sr)Cl2·6H2O, SrCl2·2H2O, LiCl·2H2O, CaCl2·4H2O and LiCl·CaCl2·5H2O in the dry-salt diagram of the quinary system. The areas of crystallization zones decrease according to the above order. The J(NaCl), J(H2O), refractive index and density of the solution gradually change regularly with the increasing of J(CaCl2) in the solution. These results on phase diagrams of the quinary system can supply theoretical reference for lithium salts and strontium salts separation from calcium chloride type brine.

Molten Salt Electrochemical Synthesis of Ternary Carbide Ti3AlC2 from Titanium‐Rich Slag

Ti3AlC2 is electrochemically synthesized from titanium‐rich slag/Al2O3/C mixtures in molten salts. The intermediate products are systematically analyzed to investigate the formation process of Ti3AlC2. The results show that the synthesis process typically involves an electrodeoxidation process and in situ carburization/combination process. In addition, most of the undesired metallic oxides contained in the titanium‐rich slag are removed effectively during the electrolysis process, and the removal mechanism of these undesired metallic oxides is further discussed. The influences of different molten salts (including molten CaCl2 and CaCl2–NaCl) and temperatures (range of 800–1000 °C) on the final products are also studied. The results show that these electrosynthesis conditions influence the morphology and phase composition of the products. The synthesized Ti3AlC2 particles possess an irregular plate‐like morphology. It is suggested that the molten salt electrochemical synthesis technology is a promising process to produce Ti3AlC2 and/or other MAX phases from multicomponent complex ores.

P-T-fluid-deformation regime of the Ediacaran Serra do Cavalo Magro orogenic gold deposit, Ribeira Belt, Brazil

The Serra do Cavalo Magro orogenic gold deposit is located in the southern Ribeira Belt, Brazil. Gold-quartz veins are hosted in Calymmian (1500–1450 Ma) metasedimentary and metabasic rocks and Ediacaran (610–600 Ma) granitic rocks. Geochronological data available in previous literature and structural-petrological relationships with host rocks and shear zones indicate that the gold mineralization was formed within 580–540 Ma during the late-stage evolution of the Brasiliano-Pan African Orogeny, related with Gondwana supercontinent assembly. Petrological modeling indicates peak metamorphic conditions from 560 °C and 7 kbar (chlorite-biotite phyllite) to 625 °C and 6.8 kbar (garnet-biotite phyllite) recorded in immediate host rocks. Gold mineralization occurs in quartz shear and extensional veins, structurally controlled by NE-trending, second- and third-order sinistral, transcurrent shear zones. The NNW-trending subvertical and subhorizontal extensional veins are oriented 55–85° in relation to the fault planes, indicating the shear zones were severely misoriented to frictional reactivation. Deformation within the shear zones was accommodated by bulging recrystallization of quartz aggregates, while feldspar aggregates from the granitic protolith underwent cataclastic flow or were replaced by sericite-epidote, producing phyllonites. Gold precipitated during stages of vein deformation within microfractures in shear and extensional veins with quartz previously subjected to bulging recrystallization. Metamorphic ore-bearing fluids are recorded in distinct assemblages of low to moderate salinities (1–18 wt.% NaCleq.) H2O–NaCl–CaCl2 and H2O–CO2–N2–NaCl–CaCl2 fluid inclusions and CO2–N2 inclusions. Microthermometric data indicate entrapment conditions of 250–350 °C and 0.3–2.3 kbar, recording hydrostatic to supralithostatic fluid pressures in post-peak metamorphic stages. Sharp fluid pressure fluctuations (0.4–1.6 kbar) resulted from earthquake rupture events and the fault-valve behavior induced circulation of fluids from distinct sources with limited partial fluid mixing, favoring the gold transportation and precipitation.

Laboratory study on the effect of leachate type to swelling behavior of bentonite

Bentonite is well known as highly plastic, swelling clay material, the product of volcanic ash. An experimental test of the effect of leachate type on swelling behavior of bentonite has been conducted. Four types of liquids, tap water, 10 g/l of NaCl solution, 11.1 g/l of CaCl2 solution, and 100 ml/l of ethanol solution were used in the tests. Liquid limit, plastic limit, free swelling index, and swelling pressure tests were carried out to evaluate the relative swelling ability of bentonite when interacted with different leachate types. The result of free swelling tests indicated bentonite swelled higher when interacted with tap water and ethanol solution compare with NaCl solution and CaCl2 solution as a liquid. The value of liquid limit and plastic limit of bentonite for ethanol solution and CaCl2 solution were highest and lowest among liquid tested, respectively. The result also showed that bentonite has the highest swelling pressure when contacted with tap water but opposite for NaCl solution.

Direct fabrication of ZrC/ZrSi composite fibers from ZrSiO4/C precursors in molten chlorides by electrochemical method

ZrC/ZrSi composite fibers were directly electro-synthesized from inexpensive and abundantly available ZrSiO4/C precursors in molten CaCl2–NaCl at 850 °C. Electrolysis was conducted at a constant voltage of 2.8 V using a graphite anode and a cathode composed of ZrSiO4/carbon mixture. The reaction mechanism of electro-synthesis process was systematically investigated by examination of partially and fully reduced samples. Results show that as-synthesized nanofiber is composed of ZrSi single crystal core and ZrC outer coating. The mechanism of composite fiber formation is a complex reaction pathway involving decomposition, electro-deoxidation and in situ carbonization. The electrochemical route in molten salt is a new promising method for simple fabrication of Zr-based composite fibers.

Electrochemical extraction of titanium from carbon-doped titanium dioxide precursors by electrolysis in chloride molten salt

In this paper, a new short process integrating carbochlorination and electrolyzation to produce metallic titanium in molten NaCl–CaCl2 electrolyte was presented. This electrochemical experiment was carried out at 1123 K using carbon-doped TiO2 precursors. The electrolysis process of intermediate produced by carbochlorination of carbon-doped TiO2 precursors was studied. The cathodic product was analyzed using X-ray diffraction (XRD), inductively coupled plasma atomic emission spectroscopy (ICP-AES) and scanning electron microscopy (SEM) after electrolysis. The evolved gas was analyzed by a gas chromatograph equipped with a thermal conductivity detector (GC-TCD). Results showed that Ti powder of 98.7% could be obtained as the final product in the cathode by electrolysis for 5 h at 4.0 V using raw pellets with a C/TiO2 mass ratio of 0.15. Furthermore, the electrochemical process of Ti deposition was comprehensively evaluated by cyclic voltammetry and squarewave voltammetry. The electrode reaction mechanisms and particle evolution principles in molten salt during this electrolysis process were discussed. It indicated that titanium chloride in lower valence (TiCl3) with more productive advantage could exist as an intermediate, and Ti3+ ions were reduced to Ti metal by a two-step mechanism corresponding to the pathway: Ti3+ → Ti2+ → Ti.

Production Features of Magnesium-Neodymium Master Alloy Synthesis

The article is devoted to studying synthesis of magnesium master alloys with neodymium for smelting ferrous and nonferrous metals. A salt composition is selected based on analysis of composition diagrams and flux requirements for melting magnesium alloys. Differential thermal analysis (DTA) is used to determine temperature ranges of thermal effects during melting components of a salt mixture KCl–NaCl–CaCl2 –MgCl2 –CaF2 –NdF3 and during reduction of neodymium compounds by magnesium. The result is a series of experimental melts revealing the main features of magnesium-neodymium master alloy synthesis, and the main factors of the metallothermal process affecting the degree of neodymium recovery. Metallographic study of the resulting magnesium-neodymium master alloys shows that a sample consists of colonies of Mg + Mg12Nd eutectic composition located at the boundaries of α –Mg dendrite cells. The method proposed for recovering neodymium from fluoride-chloride melts provides up to 99.6% extraction of neodymium.

Nanocomposite phase change materials based on NaCl–CaCl2 and mesoporous silica

The synthesis of phase change materials based on NaCl–CaCl2 molten salt mixture and mesoporous silica was investigated. The influence of mesoporous silica porosity and salt concentration on the thermal energy storage properties of the resulting materials is discussed. The nanocomposite samples were characterized by X-ray diffraction, differential scanning calorimetry, infrared spectroscopy, thermogravimetry, scanning electron microscopy and X-ray photoelectron spectroscopy. The mesoporous silica was found to act as a reactive matrix for the molten salts. Composite samples with up 95% wt. salt can be obtained and used as shape-stabilized phase change materials. The materials have heat of fusion values of up to 60.8 J g−1 and specific heat capacity between 1.0 and 1.1 J g−1 K−1. The samples exhibit thermal stability up to 700 °C and can be used for high-temperature thermal energy storage through both latent and sensible heat storage mechanisms.

Interaction of Salt Melts of Magnesium Production with Atmospheric Air

A review of publications on the interaction of salt melts of magnesium production with atmospheric air is presented. The measurement procedure of the weight of interaction products of salt melts with air is described. The results of investigating the emission intensity of hydrogen chloride and chlorine by salt melts of MgCl2–KCl–NaCl, MgCl2–NaCl–BaCl2, and MgCl2–KCl–NaCl–CaCl2 systems, as well as the emission intensity of HCl + HBr and Cl2 + Br2 gases by salt melts of the MgCl2–KCl–NaCl–NaBr system, are presented. The thermodynamic analysis of interaction reactions of magnesium salt solutions with atmospheric air is performed. It is revealed that magnesium chloride in the salt melt most intensely interacts with atmospheric air with the emission of chlorine and hydrogen chloride. The specific rates of formation of halogen-containing gases from the unit surface area of the MgCl2–KCl–NaCl, MgCl2–KCl–NaCl–BaCl2, MgCl2–KCl–NaCl–CaCl2, and MgCl2–KCl–NaCl–NaBr systems are measured. The influence of calcium chloride, sodium bromide, and magnesium fluoride on the emission intensity of halogen-containing gases by the surface of salt melts is measured. It is determined that the addition of magnesium fluoride into the composition of chloride melts reduces the emission intensity of chlorine and hydrogen chloride.

Solubility measurement and thermodynamic modeling of solid-liquid equilibria in quaternary system NaCl–CaCl2–SrCl2–H2O at 323.15 K

The solid-liquid phase equilibria in the systems NaCl–SrCl2–H2O and NaCl–CaCl2–SrCl2–H2O at 323.15 K were studied with the isothermal dissolution method. The solid-liquid equilibrium phase diagrams were constructed with the experimental results. A comparison of the diagrams of system NaCl–SrCl2–H2O from 288.15 to 373.15 K shows that area of strontium chloride salt region decreased obviously whereas the areas of NaCl almost invariant. The dry-salt diagram of the NaCl–CaCl2–SrCl2–H2O system consists of four single-salt crystallization regions for NaCl, SrCl2·6H2O, SrCl2·2H2O and CaCl2·2H2O, five univariant solubility curves and two invariant points. Combining Pitzer binary parameters obtained in the literatures, the Pitzer mixing parameters θNa,Ca, θNa,Sr, θCa,Sr, ΨNa,Ca,Cl, ΨNa,Sr,Cl and ΨCa,Sr,Cl were fitted with the solubility data in this study and literatures. The model was then used for predicting the solubilities of the two systems. The experimental data are in accordance with the predicted results.

Interaction of magnesium production salt melts with atmospheric air

The paper provides a review of the literature on the interaction of magnesium production salt melts with atmospheric air. The method for measuring the mass of reaction products of the molten salt with air is described. The results of investigation of hydrogen chloride and chlorine emission intensity by salt melts of MgCl 2 -KCl-NaCl, MgCl 2 -KCl-NaCl-BaCl 2 , MgCl 2 —KCl—NaCl—CaCl 2 systems, as well as the intensity of HCl + HBr and Cl 2 + Br 2 gas emission by MgCl 2 —KCl—NaCl—NaBr system salt melts are presented. Thermodynamic analysis of reactions of interaction of magnesium salt melts with atmospheric air is carried out. It is determined that magnesium chloride in salt melt interacts with atmospheric air most intensively with the release of chlorine and hydrogen chloride. Specific rates of halogen-containing gases formation per unit surface area of the MgCl 2 -KCl-NaCl, Mga 2 -KCl-NaCl-BaCl 2 , MgCl 2 -KCl-NaCl-CaCl 2 , MgCl 2 -KCl-NaCl-NaBr systems are measured. The influence of calcium chloride, sodium bromide and magnesium fluoride on the intensity of halogen-containing gases emission by the surface of salt melts is studied. It is found that the addition of magnesium fluoride in the composition of chloride melts reduces the intensity of chlorine and hydrogen chloride emission.

Corrosion of Carbon Steel and Cast Iron in a Gas Phase over Salt Melts Used in the Magnesium Industry

Corrosion tests of SCh15 cast iron, St.3, and St.3 with an aluminized coating are performed in certain compositions of salt melts of 10% MgCl2–KCl–NaCl and 10% MgCl2–KCl–NaCl–CaCl2 systems with concentrations of 10, 25, and 40% CaCl2, as well as in the 10% MgCl2–45% KCl–20% NaCl–25% NaBr melt and in a gas phase over these melts at 700°C. Corrosion rates of metallic samples are found by a gravimetric method. Concentrations of impurities of halogenides and hydrogen halogenides in air blown through a reactor with melts and samples are determined by the chemical analysis of absorption solutions. It is shown that the aluminizing of carbon steel can decrease the corrosion rate in a gas phase over a salt melt by a factor of 5–70. The mechanism of formation of gases aggressive with respect to carbon steel and cast iron in atmospheric air contacting with the salt chloride melt is considered. The acceleration of the formation of hydrogen chrloride and chlorine during the interaction of the salt melt with atmospheric air under the effect of corrosion products of iron is revealed.

Calculation of the Phase Diagram of the NaCl–RaCl2 System by Analyzing the NaCl–MCl2 Systems (M = Ca, Sr, Ba) Using the Schröder–Le Châtelier Equation

Phase equilibria in the binary system NaCl-RaCl2 were predicted based on the binary systems NaCl–MCl2 (M = Ca, Sr, Ba). All the considered systems are of the eutectic type. Experimental data were processed, and functional dependences Te/Z = f(Z) and Te/r = f(r) were obtained, where Te is the melting point of the eutectic in the binary systems NaCl–CaCl2, NaCl–SrCl2, and NaCl–BaCl2; Z is the atomic number of Ca, Sr, or Ba; and r is its ionic radius. By further calculations using these functions, the melting point of the eutectic in the NaCl–RaCl2 system was found. Using the Schroder–Le Châtelier equation, the composition of the binary eutectic in the predicted system and the molar enthalpy of melting of RaCl2 were calculated, and branches of the liquidus of the system were constructed.

Multiple mineralization events of the Paleozoic Tuwu porphyry copper deposit, Eastern Tianshan: evidence from geology, fluid inclusions, sulfur isotopes, and geochronology

The Tuwu porphyry Cu deposit, located in Eastern Tianshan, NW China, is hosted by a plagiogranite porphyry and Carboniferous Qi’eshan Group volcanic rocks. Based on crosscutting relationships and mineral assemblages, hydrothermal alteration and mineralization processes at Tuwu can be divided into four stages: early propylitic alteration (stage I), porphyry mineralization (stage II), overprinting mineralization (stage III), and post-mineralization (stage IV). The porphyry mineralization stage (stage II) contributed to the majority of the Cu–Mo resource, with Cu mineralization occurring mainly as quartz-chalcopyrite veins. Stage III also produced minor Cu mineralization, characterized by chalcopyrite–anhydrite–chlorite–calcite assemblages. Fluid inclusion (FI) study reveals that stage II is characterized by a high-temperature, high-salinity, highly oxidized, and K-rich H2O–NaCl–CaCl2 fluid. Fluid boiling and mixing likely occurred during the porphyry mineralization stage, leading to the precipitation of chalcopyrite and pyrite. Alteration and mineralization in stage III were derived from a S-rich H2O–NaCl–CaCl fluid, with fluid boiling leading to the precipitation of chalcopyrite. The δ34S values of chalcopyrite from stages II and III are − 0.8–0.6 ‰ and 1.1–1.3 ‰, respectively, suggesting magmatic sources for the ore-forming components of both stages. 40Ar/39Ar dating indicates that stage II likely occurred at 328.1 ± 1.4 Ma, around the age emplacement of the causative plagiogranite porphyry (ca. 337.7–330.3 Ma). We suggest the overprinting mineralization event occurred at ca. 323 Ma, spatially and genetically related to the emplacement of the quartz albite porphyry at 323.6 ± 2.5 Ma.

Thermal Analysis of the System NaCl–CaCl2–CaO

Four partial section of the ternary system NaCl-CaCl2-CaO have been studied by a differential-thermal and an X-Ray phase analysis. The composition (mol.%) NaCl(0.47)-CaCl2(0.48)-CaO(0.05) corresponds to a eutectic and has crystallization temperature of 480 °C. Solid solutions have not been detected.

Thermal Analysis of the System NaCl–CaCl2–CaO

The property of the systems MCl-CaCl 2 and MCl-CaCl2-CaO (where M is a alkali metal) allow its used in many processes of modern industry, in particular for the production of metals. However, in spite of this the information on the diagrams of the state of ternary systems of MCl-CaCl2-CaO and the behavior of refractory metal oxides in these melt is extremely limited. This work shows the results of thermal analysis of partial cuts the ternary system NaCl-CaCl2-CaO. The table 1 shows the compositions and the melting point (crystallization point) characteristic points of the system NaCl-CaCl2-CaO. Table 1. The composition and melting point (crystallization point) of characteristic points. System T °C Concentrate and I component in , % The character of the point Na Cl CaO CaCl 2 Na Cl - CaCl 2 500 0.490 - 0.510 Eutectic ( e 1 ) CaO - CaCl 2 750 - 0.065 0.935 Eutectic ( e 2 ) 835 - 0.185 0.715 Peritec t ic ( p 2 ) 500 0.470 0.05 0.480 Eutectic ( E ) The results of investigation partial cuts ternary system showing that in the concentration range 0–20 mol.% CaO ternary system NaCl-CaCl2-CaO is eutectic. The composition of eutectic (in mol.%) is NaCl(0.47)-CaCl2(0.48)-CaO(0.05) and its molten point is 480 °C. In the fused samples the phases of the initial components of the system are identified. Solid solutions and phases of the composition Ca(OCl)2 was not detected.