AM_Boracite_1
Formula: Mg3 B7 O13 Cl
Name: Boracite
Unit cell: 8.5496 8.5496 12.091 90.0 90.0 90.0 , V=883.80
Space group: PCA21 (29)

Dowty E , Clark J R , Zeitschrift fur Kristallographie , 138 (1973) p.64-99, Crystal-structure refinements for orthorhombic boracite,, Mg3B7O13Cl, and a trigonal, iron-rich analogue, Locality: Solvayshall, Roschwitz, Germany, Note: [.25 .25 0] added to all atoms to move origin to screw axis