Jacobsite R070719

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Record 2 of 3  


Name: Jacobsite
RRUFF ID: R070719
Ideal Chemistry: Mn2+Fe3+2O4
Locality: Kombat mine, Kombat, Grootfontein District, Otjozondjupa Region, Namibia
Source: William W. Pinch [view label]
Owner: RRUFF
Description: Black, with reddish highlights, octahedra associated with kombatite, R070720, and colorless barysilite, R070651
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Spinel (66) ]
Quick search: [ All Jacobsite samples (3) ]
CHEMISTRY 
RRUFF ID: R070719.2
Sample Description: Microprobe Fragment
Measured Chemistry: Mn1.03(Fe3+1.88Mn0.07Al0.03Mg0.02)O4
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R070719
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R070719.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.5099(7)Å    b: 8.5099(7)Å    c: 8.5099(7)Å
alpha: 90°    beta: 90°    gamma: 90°   Volume: 616.26(5)Å3    Crystal System: cubic
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
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REFERENCES for Jacobsite

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]

Damour A A (1869) Notice sur la jakobsite, nouvelle espèce minérale, Comptes Rendus Hebdomadaires des Séances de l'Académie des Sciences, 69, 168-172   [view file]

Nordenskiõld A E (1877) Nya mineralier från Långban, Geologiska Föreningens i Stockholm Förhandlingar, 3, 376-384   [view file]

Johansson K (1928) Mineralogische Mitteilungen, Zeitschrift für Kristallographie, 68, 87-118   [view file]

Fleischer M (1944) New mineral names, American Mineralogist, 29, 73-74   [view file]

Fleischer M (1973) New mineral names, American Mineralogist, 58, 560-562   [view file]

International Mineralogical Association (1980) International Mineralogical Association: Commission on new minerals and mineral names, Mineralogical Magazine, 43, 1053-1055   [view file]

Essene E J, Peacor D R (1983) Crystal chemistry and petrology of coexisting galaxite and jacobsite and other spinel solutions and solvi, American Mineralogist, 68, 449-455   [view file]

Beard J S, Tracy R J (2002) Spinels and other oxides in Mn-rich rocks from the Hutter Mine, Pittsylvania County, Virginia, U.S.A.: implications for miscibility and solvus relations among jacobsite, galaxite, and magnetite, American Mineralogist, 87, 690-698   [view file]

Tracy R J, Beard J S (2003) Manganoan kinoshitalite in Mn-rich marble and skarn from Virginia, American Mineralogist, 88, 740-747   [view file]

Stokes T N, Bromiley G D, Diego Gatta G, Rotiroti N, Potts N J, Saunders K (2018) Cation distribution and valence in synthetic Al-Mn-O and Fe-Mn-O spinels under varying fO2 conditions, Mineralogical Magazine, 82, 975-992

Bosi F, Biagioni C, Pasero M (2019) Nomenclature and classification of the spinel supergroup, European Journal of Mineralogy, 31, 183-192   [view file]