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Stoppaniite
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| Stoppaniite Formula: (Fe1.22 Al.42 Mg.36) (Be3 Si6) Na.55 (O19 H2) Name: Stoppaniite Unit cell: 9.397 9.397 9.202 90.0 90.0 120.0 , V=703.71 Space group: P6/MCC (192) |
Ferraris G , Prencipe M , Rossi P , European Journal of Mineralogy , 10 (1998) p.491-496, Stoppaniite, a new member of the beryl group: crystal structure, and crystal-chemical implications
