Wilkinsonite R060922

Name: Wilkinsonite
RRUFF ID: R060922
Ideal Chemistry: Na4[Fe2+8Fe3+4]O4[Si12O36]
Locality: Warrumbungle Volcanics, New South Wales, Australia
Source: [view label]
Owner: RRUFF
Description: Black anhedral grains found as inclusions within colorless anorthoclase
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Sapphirine (12) ]
RRUFF ID: R060922.2
Sample Description: Microprobe Fragment
Measured Chemistry: Na1.00(Fe2+1.87Mn0.07Fe3+0.03)Σ=2(Fe3+0.97Cr0.03)Σ=1(Si2.94Al0.06)Σ=3O10 ; the dark phase is anorthoclase: (Na0.71K0.29)Σ=1(Al0.95Fe3+0.05)Σ=1Si3.00O8
Sample Description: Unoriented sample

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RRUFF ID: R060922
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 10% of 150mW
RRUFF ID: R060922.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.324(2)Å    b: 10.779(2)Å    c: 8.923(1)Å
alpha: 105.18(1)°    beta: 96.38(1)°    gamma: 125.25(1)°   Volume: 737.9(1)Å3    Crystal System: triclinic
  File Type Information Close
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 Wilkinsonite

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]

Duggan M B (1990) Wilkinsonite, Na2Fe2+4Fe3+2Si6O20, a new member of the aenigmatite group from the Warrumbungle Volcano, New South Wales, Australia, American Mineralogist, 75, 694-701   [view file]

Burt D M (1994) Vector representation of some mineral compositions in the aenigmatite group, with special reference to hogtuvaite, The Canadian Mineralogist, 32, 449-457   [view file]

Jensen B B (1996) Solid solution among members of the aenigmatite group, Mineralogical Magazine, 60, 982-986   [view file]

Kunzmann T (1999) The aenigmatite-rhönite mineral group, European Journal of Mineralogy, 11, 743-756   [view file]

Burt J B, Downs R T, Costin G (2007) Single-crystal X-ray refinement of wilkensonite, Na2Fe2+4Fe3+2Si6O20, Acta Crystallographica, E63, i122-i124   [view file]

Grew E S, Hålenius U, Pasero M, Barbier J (2008) Recommended nomenclature for the sapphirine and surinamite group (sapphirine supergroup), Mineralogical Magazine, 72, 839-876   [view file]