Fosterite Crystallography

Composition

Mg(1.028)Mn(0.964)SiO4

Classification

Nesosilicate, Olivine Group

Structural Parameters

a=4.794, b=10.491, c=6.123 Å
alpha=90, beta=90, gamma=90°
Space Group: Pbnm

atom

x/a

y/b

z/c
Mg 0.9870 0.2790 0.2500
Si 0.4226 0.0910 0.2500
O1 0.7585 0.0867 0.2500
O2 0.2301 0.4489 0.2500
O3 0.2782 0.1590 0.0374

Reference

Francis, C.A., and P.H. Ribbe. 1980. The forsterite-tephroite series: I. Crystal structure refinements. American Mineralogist 65:1263-1269

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Original release: 1 Oct 1998;