Abstract
The neutron structure factor for SiO 2 glass at 22.0±0.5°C was determined in the range of Q , 1.0–25.5 A -1 , by means of the time-of-flight (TOF) neutron diffraction method using the electron linear accelerator (LINAC). An analysis of neutron and X-ray diffraction data was carried out by using a general procedure of analysis of structure factors based on a theoretical viewpoint of liquids. Excellent agreement between the calculated structure factor curves and the observed ones over the whole range of Q has ascertained that the structure of SiO 2 glass can be explained as a liquid-like structure which is an aggregate of randomly packed clusters consisting of five SiO 2 `molecules'. Within the cluster one central `molecule' is tetrahedrally surrounded by four peripheral `molecules' with a random orientation about the Si–O bond direction.
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