AM_Leucophoenicite
Formula: Mn7 Si3 O14 H2
Name: Leucophoenicite
Unit cell: 10.842 4.826 11.324 90.0 103.93 90.0 , V=575.09
Space group: P121/A1 (14)

Moore P B , American Mineralogist , 55 (1970) p.1146-1166, Edge-sharing silicate tetrahedra in the crystal structure of leucophoenicite