Abstract
The crystal structure of khanneshite (Na2.75Ca0.23)2.98(Ba1.08Sr0.63Ca0.46Ce0.46La0.18Nd0.15Pr0.04)3.00 · (CO3)5 found in carbonatites from the Khibiny massif (the Kola Peninsula) was solved by the Rietveld method. The X-ray diffraction data were collected on a focusing STOE-STADIP diffractometer equipped with a bent Ge(111) primary-beam monochromator (λMoKα1 radiation, 2.00° < 2θ < 54.98°, 311 reflections). All the calculations were performed within the sp. gr. P63mc; a = 10.5790(1) A, c = 6.5446(1) A, V = 634.31(1) A3, RP = 2.38, Rwp = 3.26, RB = 1.42, RF = 1.79. The atoms of the cations were refined with anisotropic thermal parameters.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
