Ribbeite R140497


Name: Ribbeite
RRUFF ID: R140497
Ideal Chemistry: Mn2+5(SiO4)2(OH)2
Locality: Kombat mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
Source: Rock Currier [view label]
Owner: RRUFF
Description: Transparent to translucent pink fragments in a gelatin capsule
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Humite (20) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R140497
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 1% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R140497.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.7279(3)Å    b: 15.6873(4)Å    c: 14.4291(4)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 2428.3(2)Å3    Crystal System: orthorhombic
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REFERENCES for Ribbeite

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]

Peacor D R, Dunn P J, Su S, Innes J (1987) Ribbeite, a polymorph of alleghanyite and member of the leucophoenicite group from the Kombat mine, Namibia, American Mineralogist, 72, 213-216   [view file]

Dunn P J (1991) Rare minerals of the Kombat mine, The Mineralogical Record, 22, 421-425

Freed R L, Rouse R C, Peacor D R (1993) Ribbeite, a second example of edge-sharing silicate tetrahedra in the leucophoenicite group, American Mineralogist, 78, 190-194   [view file]