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Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
FHSM G-1
Quartz
FHSM G-1000
Quartz Group Agate
FHSM G-1001
Quartz Group Agate
FHSM G-1002
Quartz Group Agate
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Tectosilicates Si Tetrahedral Frameworks (4)
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Quartz Group (4)
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Chalcedony (3)
Quartz (1)
Individual/Organization
Schmidt, T. (1)
Franks, A.G. (3)