AM_Turquoise Formula: Cu P4 Al6 O28 H16 Name: Turquoise Unit cell: 7.424 7.629 9.91 68.61 69.71 65.08 , V=461.40 Space group: P-1 (2)

Cid-Dresdner H , Zeitschrift fur Kristallographie , 121 (1965) p.87-113, Determination and refinement of the crystal structure of turquois, CuAl6(PO4)4(OH)8*4H2O, Locality: Virginia, USA