Name: Apophyllite

Formula: KCa4Si8O20(F,OH).8H2O

Author: C. M. B. Line, ILL, Grenoble, France

Reference: J. Chem. Phys. 112 (2000) 9058-9067.

Instrument: TFXA

Comment: Exact formula Na0.1Al0.07K0.92Ca4.1Si8.1O20 (F not determined)