Untitled - Mineralogia Polonica

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(Cu3.90 Mgo.05Feo.03Cao.02Zno.01)((AsO4)1.99](OH)2.00] · 2.5 H20; the mineral ... Cornwallite, Cu5(AsO4)2 (OH)4, is monoclinic with the space group P21/a and ..... A comparison with its polymorph cornubite and the PO4 – analogue ...