Citation: Halenius, U.; Haussermann, U.; Harryson, H. (2005). Holtstamite, Ca3(Al,Mn3+)2(SiO4)3-x(H4O4)x, a new tetragonal hydrogarnet from Wessels Mine, South Africa. European Journal of Mineralogy, 17, pp. 375-382.
Formula: Al0.994 Ca3 H4 Mn1.006 O12 Si1.95
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 H32 Mn16 O96 Si24 (Al2 H4 Mn2 O12 Si3)
Multiplicity: 1