AM_Holdawayite Formula: Mn11.16 C4 O26 Cl1.69 H14 Name: Holdawayite Unit cell: 23.437 3.3137 16.618 90.0 111.15 90.0 , V=1203.67 Space group: C12/M1 (12)

Peacor D R , Rouse R C , American Mineralogist , 73 (1988) p.637-642, Holdawayite, Mn6(CO3)2(OH)7(Cl,OH), a structure containing anions in, zeolite-like channels