Holtstamite R170001

		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]