Turkestanite R060525



Name: Turkestanite
RRUFF ID: R060525
Ideal Chemistry: (K,   )(Ca,Na)2ThSi8O20·nH2O
Locality: DeMix Quarry, Mont St. Hilaire, Rouville County, Quebec, Canada
Source: Michael Scott S100210 [view label]
Owner: RRUFF
Description: Divergent group of brown rectangular prisms
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Steacyite (4) ]
CHEMISTRY 
RRUFF ID: R060525.2
Sample Description: Microprobe Fragment
Measured Chemistry: K0.50(Ca0.78Na0.77K0.12Mn0.14Al0.07Fe0.05U0.02Pb0.02Ce0.02Nd0.01)Σ=2.00Th1.04Si8O20
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented Raman on the primary sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R060525
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R060525.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 7.563(1)Å    b: 7.563(1)Å    c: 14.723(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 842.1(4)Å3    Crystal System: tetragonal
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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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REFERENCES for Turkestanite

American Mineralogist Crystal Structure Database Record: [view record]

Pautov L A, Agakhanov A A, Sokolova E V, Kabalov Y K (1997) Turkestanite Th(Ca,Na)2(K1-x   x)Si8O20·nH2O – a new mineral, Zapiski Vserossijskogo Mineralogicheskogo Obshchestva, 126, issue 6 45-55   [view file]

Jambor J L, Grew E S, Roberts A C (1998) New mineral names, American Mineralogist, 83, 1347-1352   [view file]

Kabalov Y K, Sokolova E V, Pautov L A, Schneider J (1998) Crystal structure of a new mineral turkestanite: a calcium analogue of steacyite, Crystallography Reports, 43, 584-588

Estrade G, Salvi S, Béziat D (2018) Crystallization and destabilization of eudialyte-group minerals in peralkaline granite and pegmatite: a case study from the Ambohimirahavavy complex, Madagascar, Mineralogical Magazine, 82, 375-399