Arrojadite-(KFe) R070319
Name: Arrojadite-(KFe)
RRUFF ID: R070319
Ideal Chemistry: (KNa)Fe2+(CaNa2)Fe2+13Al(PO4)11(PO3OH)(OH)2
Locality: Nickel Plate mine, Keystone District, Pennington County, South Dakota, USA
Source: James Shigley [view label]
Owner: RRUFF
Description: Green massive
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ arrojadite (6) ]
CHEMISTRY 
RRUFF ID: R070319.2
Sample Description: Microprobe Fragment
Measured Chemistry: (K0.67Na1.33)Σ=2Fe2+1.00(Ca0.80Na2.20)Σ=3(Fe2+7.53Mn4.65Mg0.64Al0.16Ti0.02)Σ=13Al1.00(P1.00O4)11(P1.00O3OH)(OH)2; OH estimated by charge balance
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: R070319
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Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R070319.1
Sample Description: Powder, cell parameters are from single crystal
Cell Refinement Output: a: 24.709(2)Å    b: 10.039(1)Å    c: 16.519(2)Å
alpha: 90°    beta: 105.680(5)°    gamma: 90°   Volume: 3945(1)Å3    Crystal System: monoclinic
  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

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

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X-ray Data (XY - Processed)
RRUFF File
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RRUFF File
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REFERENCES for Arrojadite-(KFe)

American Mineralogist Crystal Structure Database Record: [view record]

Guimarães D (1925) Arrojadita, um novo mineral do grupo da wagnerita, Publicaçao da Inspectoria de Obras Contra as Seccas, Rio de Janeiro, 58, 119-122   [view file]

Foshag W F (1927) New mineral names, American Mineralogist, 12, 355-356   [view file]

Krutik V M, Pushcharovskii D Y, Podebimskaya E A, Belov N V (1979) Crystal structure of arrojadite (translated into English), Kristallografiya, 24, 743-750   [view file]

Merlino S, Mellini M, Zanazzi P F (1981) Structure of arrojadite, KNa4CaMn4Fe10Al(PO4)12(OH,F)2, Acta Crystallographica, B37, 1733-1736

Yakubovich O V, Matviyenko Y N, Simonov M A, Mel'nikov O K (1986) The crystalline structure of synthetic Fe3+-arrojadites with the idealized formula K2Na5Fe2+14Fe3+(PO4)12(OH)2, Vestnik Moskovskogo Universiteta, Geologiya, 1986, 36-47   [view file]

Steele I M (2002) Arrojadite: variations in space group and composition based on four new refinements, 18th General Meeting of the International Mineralogical Association, Edinburgh, UK, 2002, MO2-117   [view file]

Chopin C, Oberti R, Camara F (2006) The arrojadite enigma: II. Compositional space, new members, and nomenclature of the group, American Mineralogist, 91, 1260-1270   [view file]

Birch W D (2018) Minerals in the arrojadite, alluaudite and jahnsite-whiteite groups from the Mount Wills pegmatite field, Victoria, Australia, European Journal of Mineralogy, 30, 635-645