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Name: Medaite RRUFF ID: R130098 Ideal Chemistry: Mn2+6V5+Si5O18(OH) Locality: Molinello mine, Graveglia Valley, Ne, Genova Province, Liguria, Italy Source: Donald Doell (Large Piece) and Rock Currier (Small Piece) [view label] Owner: RRUFF Description: Red grains and prismatic crystals Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction. |
Mineral Group: [ Medaite (1) ] |
RAMAN SPECTRUM | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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POWDER DIFFRACTION | |||||||
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RRUFF ID: | R130098.9 | ||||||
Sample Description: | Single crystal, powder profile is calculated | ||||||
Cell Refinement Output: |
a: 6.711(1)Å b: 28.978(4)Å c: 7.579(1)Å alpha: 90° beta: 95.329(8)° gamma: 90° Volume: 1467.6(3)Å3 Crystal System: monoclinic |
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REFERENCES for Medaite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file] |
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Gramaccioli C M, Liborio G, Pilati T (1981) Structure of medaite, Mn6[VSi5O18(OH)]: the presence of a new kind of heteropolysilicate anion, Acta Crystallographica, B37, 1972-1978 |
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Gramaccioli C M, Griffin W L, Mottana A (1982) Medaite, Mn6[VSi5O18(OH)], a new mineral and the first example of vanadatopentasilicate ion, American Mineralogist, 67, 85-89 [view file] |
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Nagashima M, Armbruster T (2010) Ardennite, tiragalloite and medaite: structural control of (As5+,V5+,Si4+)O4 tetrahedra in silicates, Mineralogical Magazine, 74, 55-71 [view file] |
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