AM_Svanbergite
Formula:
Sr Al3 (S P) O14 H6
Name:
Svanbergite
Unit cell:
6.89 6.89 6.89 60.63 60.63 60.63 , V=234.57
Space group:
R-3M (166)
Pabst A , American Mineralogist , 32 (1947) p.16-30, Some computations on svanbergite, woodhouseite and alunite, trial C