#192

#192

P6/mcc

Example – Beryl, Al2Be3(SiO3)6(H2O)0.0991

From the ancient Greek, beryllos, signifying a “precious blue-green color of sea water” stone, but through later usage, applied only to Beryl.

Structure and thermal expansion of Beryl

Morosin, B.
Acta Crystallographica B (1972) 28, p1899-p1903

 

CIF
http://1drv.ms/1j68KRV

Beryl

 

SiO4 tetrahedra (orange)
BeO4 distorted tetrahedra (blue)
AlO6 distorted octahedra (blue-grey)

 

3D rotatable model of Beryl

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