Citation: Jacobsen, S. D.; Smyth, J. R.; Swope, R. J.; Sheldon, R. I. (2000). Two proton positions in the very strong hydrogen bond of serandite, NaMn2[Si3O8(OH)] Sample: X-ray. American Mineralogist, 85, pp. 745-752.
Formula: H Mn1.933 Na O9 Si3
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: H2 Mn4 O18 Si6 (H Mn2 O9 Si3)
Multiplicity: 1
Coordination sequences: