AM_Cummingtonite
Formula:
Si8 (Mg4.68 Fe2.32) O24
Name:
Cummingtonite
Unit cell:
9.51 18.19 5.33 90.0 101.9 90.0 , V=902.21
Space group:
C12/M1 (12)
Fischer K F , American Mineralogist , 51 (1966) p.814-818, A further refinement of the crystal structure of cummingtonite, (Mg,Fe)7(Si4O11)2(OH)2