Helvine R060621

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Record 8 of 23  


Name: Helvine
RRUFF ID: R060621
Ideal Chemistry: Be3Mn2+4(SiO4)3S
Locality: Foote mine, Kings Mountain District, Cleveland County, North Carolina, USA
Source: Michael Scott S100830 [view label]
Owner: RRUFF
Description: Yellowish-brown tetrahedra
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ sodalite (23) ] [ cancrinite-sodalite (36) ]
Quick search: [ All Helvine samples (2) ]
CHEMISTRY 
RRUFF ID: R060621.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Mn2+3.72Zn0.18Fe3+0.08Ca0.02)Σ=4Be3.00((Si0.97Al0.03)Σ=1O4)3S1.00; BeO assumed by stoichiometry
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: R060621
Wavelength:
Sample Description: Unoriented Raman on the primary sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R060621.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.30(2)Å    b: 8.30(2)Å    c: 8.30(2)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 571.4(6)Å3    Crystal System: cubic
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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 Helvine

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]

Werner A G (1817) Helvin, in Letztes Mineral-System bey Craz und Gerlach, und bey Carl Gerold Freiberg und Wien 29-29   [view file]

Glass J J, Jahns R H, Stevens R E (1944) Helvite and danalite from New Mexico and the helvite group, American Mineralogist, 29, 163-191   [view file]

Kingsbury A W G (1961) Beryllium minerals in Cornwall and Devon: helvine, genthelvite, and danalite, Mineralogical Magazine, 32, 921-940   [view file]

Dunn P J (1976) Genthelvite and the helvine group, Mineralogical Magazine, 40, 627-636   [view file]

Kudoh Y, Takéuchi Y (1981) The effect of pressure on helvite Mn8S2[Be6Si6O24], Zeitschrift für Kristallographie, 173, 305-312   [view file]

Hassan I, Grundy H D (1984) The crystal structures of sodalite-group minerals, Acta Crystallographica, B40, 6-13

Hassan I, Grundy H D (1985) The crystal structures of helvite group minerals, (Mn,Fe,Zn)8(Be6Si6O24)S2, American Mineralogist, 70, 186-192   [view file]

Antao S M, Hassan I (2002) Thermal analyses of sodalite, tugtupite, danalite and helvite, The Canadian Mineralogist, 40, 163-172   [view file]

Hettmann K, Wenzel T, Marks M, Markl G (2012) The sulfur speciation in S-bearing minerals: New constraints by a combination of electron microprobe analysis and DFT calculations with special reference to sodalite-group minerals, American Mineralogist, 97, 1653-1661   [view file]