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Pumpellyite
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| Pumpellyite Formula: Mg4.76 Al5.01 Si6 O28 Name: Pumpellyite Unit cell: 8.5758 5.7295 18.5376 90.0 97.691 90.0 , V=902.65 Space group: P121/M1 (11) |
Artioli G , Fumagalli P , Poli S , American Mineralogist , 84 (1999) p.1906-1914, The crystal structure of Mg8(Mg2Al2)Al8Si12(O,OH)56 pumpellyite and its, relevance in ultramafic systems at high pressure
