AM_Nchwaningite Formula: Mn2 Si O6 H4 Name: Nchwaningite Unit cell: 12.672 7.217 5.341 90.0 90.0 90.0 , V=488.45 Space group: PCA21 (29)

Nyfeler D , Armbruster T , Dixon R , Bermanec V , American Mineralogist , 80 (1995) p.377-386, Nchwaningite, Mn2SiO3(OH)2.H2O, a new pyroxene-related chain silicate from the, N chwaning mine, Kalahari manganese field, South Africa