Medaite R130098
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 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R130098
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Sample Description: Unoriented sample
Instrument settings: Almega 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
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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Calculated diffraction file.

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Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Medaite

American Mineralogist Crystal Structure Database Record: [view record]

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]

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

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]

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]