Material name α- Quartz
Composition SiO2
Chemical formula weight 60.08
System Trigonal
Temperature (ºC) r.t.
a (Å), b (Å), c (Å) 4.921(1) 4.921(1) 5.4163(8) @
α (deg), β (deg), γ (deg) 90 90 120 @
Unit cell volume (Å3) 113.6
Calculated density (g/p3) 2.63
Z 3
Space group P 3121 (No.152)
atom site g x/a y/b z/c B2)
Si 3a 1 0.4698(2) 0 1/3 0.363
O 6c 1 0.4151(5) 0.2675(4) 0.2139(1) 0.80
Comment B values were calculated on the basis of Ueq values in the reference.

Reference: J. Glinnemann, H.E. King, H. Schulz, T. Hahn, S.J. la Placa, and F. Dacol, Zeitschrift für Kristallographie, 198, 177 (1992).