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Holtstamite R170001

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Record 61 of 97  


Name: Holtstamite
RRUFF ID: R170001
Ideal Chemistry: Ca3Al2(SiO4)2(OH)4
Locality: Wessels mine, Kalahari manganese field, South Africa
Source: Paul Botha
Owner: RRUFF
Description: Yellow to brownish-yellow granular crystals, associate with Mn-rich vesuvianite, calcite, and henritermierite
Status: The identification of this mineral has been confirmed only by single crystal X-ray diffraction.
Mineral Group: [ garnet (97) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R170001
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (Processed)
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R170001.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 12.2878(30)Å    b: 12.2878(30)Å    c: 11.9748(53)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 1808.06(36)Å3    Crystal System: tetragonal
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REFERENCES for Holtstamite

American Mineralogist Crystal Structure Database Record: [view record]

Gerya T, Maresch W, Burchard M, Zakhartchouk V, Doltsinis N, Fockenberg T (2005) Thermodynamic modeling of solubility and speciation of silica in H2O-SiO2 fluid up to 1300°C and 20 kbar based on the chain reaction formalism, European Journal of Mineralogy, 17, 269-283

Halenius U, Haussermann U, Harryson H (2005) Holtstamite, Ca3(Al,Mn3+)2(SiO4)3-x(H4O4)x, a new tetragonal hydrogarnet from Wessels Mine, South Africa, European Journal of Mineralogy, 17, 375-382   [view file]

Piilonen P C, Locock A, Grew E S (2005) New mineral names, American Mineralogist, 90, 1945-1952   [view file]

Grew E S, Locock A J, Mills S J, Galuskina I O, Galuskin E V, Hålenius U (2013) Nomenclature of the garnet supergroup, American Mineralogist, 98, 785-811   [view file]