AM_Anorthite_9 Formula: Mn.196 Ca.716 Na.045 (Al1.911 Si2.089) O8 Name: Anorthite Unit cell: 8.131 12.847 7.069 94.03 115.9 90.72 , V=661.84 Space group: C-1 (2)

Matsui T , Kimata M , European Journal of Mineralogy , 9 (1997) p.333-344, Crystal chemistry of synthetic Mn-bearing anorthite:, Incorporation of MnAl2Si2O8 end-member into feldspar, Note: U(1,1) for Obo altered to reproduce Uiso