Citation: Mellini, M.; Merlino, S.; Pasero, M. (1986). X-ray and HRTEM structure analysis of orientite. American Mineralogist, 71, pp. 176-187.
Formula: Ca4 H3.25 Mn6.64 O32 Si8
List type: noninterleaving
List: 2D
Basis: (1;0;0 0;1;0)
Dimensionality: 2
Formula: Ca8 Mn20 O60 Si22 (Ca4 Mn10 O30 Si11)
Multiplicity: 1