AM_Tremolite_12 Formula: Na1.18 Mg4.7 Fe.25 Mn.02 Al.03 Ca1.63 Si8 O23.42 F.58 H3.42 Name: Tremolite Unit cell: 9.868 18.033 5.273 90.0 104.66 90.0 , V=907.78 Space group: C12/M1 (12)

Hawthorne F C , Oberti R , Martin R F , The Canadian Mineralogist , 44 (2006) p.1171-1179, Short-range order in amphiboles from the Bear Lake diggings, Ontario, Locality: Bear Lake diggings, Bancroft area of Ontario, Canada, Sample: 757