AM_Olmiite Formula: Ca1.14 Mn.84 Fe.01 Si O5 H2 Name: Olmiite Unit cell: 9.249 9.076 10.342 90.0 90.0 90.0 , V=868.15 Space group: PBCA (61)

Bonazzi P , Bindi L , Medenbach O , Pagano R , Lampronti G I , Menchetti S , Mineralogical Magazine , 71 (2007) p.193-201, Olmiite, CaMn[SiO3(OH)](OH), the Mn-dominant analogue of poldervaartite,, a new mineral species from Kalahari manganese fields (Republic of South Africa), Locality: N Chwaning II mine, Republic of South Africa