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Neptunite
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| Neptunite Formula: Na2 K Li Ti2 Fe2 Si8 O24 Name: Neptunite Unit cell: 16.436 12.436 9.966 90.0 115.63 90.0 , V=1836.60 Space group: C1C1 (9) |
Kunz M , Armbruster T , Lager G A , Schultz A J , Goyette R J , Lottermoser W , Amthauer G , Physics and Chemistry of Minerals , 18 (1991) p.199-213, Fe, Ti ordering and octahedral distortions in acentric neptunite:, temperature dependent X-ray and neutron structure refinements, and Mossbauer Spectroscopy, Sample: T = 15 K
