AM_Fluororichterite_1
Formula:
Si8 Mg5 (Na2 Ca2) K4 O22 F2
Name:
Fluororichterite
Unit cell:
9.979 18.036 5.27 90.0 106.71 90.0 , V=908.45
Space group:
I12/M1 (12)
Cameron M , Sueno S , Papike J J , Prewitt C T , American Mineralogist , 68 (1983) p.924-943, High temperature crystal chemistry of K and Na fluor-richterites, Na fluor-richterite 400C