Crystal Structure of Scapolite from Urdini Lakes, Northwestern Rila, Bulgaria
Keywords:scapolite, single-crystal X-ray analysis, space group
The paper provides new insight on the choice of correct space group for description of scapolite crystal structures, with a view of the preferred positions by Si and Al ions and their framework ordering. Samples of scapolite from a skarn zone around Urdini lakes, Northwestern Rila have been analysed with SEM-EDS and single crystal X-ray diffraction. The obtained value for the meionite component Me) is around 70. The crystal structure of the studied sample has been refined in the tetragonal I4/m and P42/n space groups, traditionally assigned to scapolite members. In addition, structural determination has been conducted in C2/m.
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LicenseCopyright (c) 2023 Proceedings of the Bulgarian Academy of Sciences
Copyright (c) 2022 Proceedings of the Bulgarian Academy of Sciences
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