Important Update News

The RRUFF Project is being updated to improve its interface and content. The beta version of the update is accessible to the public at RRUFF.net. New data is only being added to the beta site. Please note that it is in development, and some components are not functional. Existing RRUFF.info links will resolve to the new site after RRUFF.net is officially released.

We are grateful to NASA for the funding of this effort.

Potassic-arfvedsonite R050516


Name: Potassic-arfvedsonite
RRUFF ID: R050516
Ideal Chemistry: KNa2(Fe2+4Fe3+)Si8O22(OH)2
Locality: Red Wine complex, Labrador, Newfoundland, Canada
Source: Frank Hawthorne
Owner: RRUFF
Description: Black fragments, structure is published in Can Min 14 (1976) 346-356
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ amphibole (107) ]
CHEMISTRY 
RRUFF ID: R050516.2
Sample Description: Microprobe Fragment
Measured Chemistry: (K0.72Na0.250.03)Na2.00(Fe2+3.75Ca0.15Mg0.10)Σ=4(Fe3+0.55Al0.30Ti0.10Mn0.05)Si8O22(OH)2
Reference File: [ View PDF ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
DOWNLOADS:

  To download sample data,
  please select a specific
  orientation angle.

Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R050516
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
POWDER DIFFRACTION 
RRUFF ID: R050516.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 10.007(2)Å    b: 18.077(2)Å    c: 5.332(1)Å
alpha: 90°    beta: 104.101(7)°    gamma: 90°   Volume: 935.48Å3    Crystal System: monoclinic
  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.

X Min:    X Max:    X Sort:
REFERENCES for Potassic-arfvedsonite

American Mineralogist Crystal Structure Database Record: [view record]

Nickel E H, Mark E (1965) Arfvedsonite and aegirine–augite from Seal Lake, Labrador, The Canadian Mineralogist, 8, 185-197   [view file]

Hawthorne F C (1976) The crystal chemistry of amphiboles: V. The structure and chemistry of arfvedsonite, The Canadian Mineralogist, 14, 346-356   [view file]

Burke E A J, Leake B E (2004) "Named amphiboles": a new category of amphiboles recognized by the International Mineralogical Association (IMA), and the proper order of prefixes to be used in amphibole names, The Canadian Mineralogist, 42, 1881-1883   [view file]

Pekov I V, Chukanov N V, Lebedeva Y S, Pushcharovsky D Y, Ferraris G, Gula A, Zadov A E, Novakova A A, Petersen O V (2004) Potassicarfvedsonite, KNa2Fe2+4Fe3+Si8O22(OH)2, a K-dominant amphibole of the arfvedsonite series from agpaitic pegmatites - Mineral data, structure refinement and disorder in the A site, Neues Jahrbuch für Mineralogie, Monatshefte, 2004, 555-574

Piilonen P C, Ercit T S (2005) New mineral names, American Mineralogist, 90, 1466-1469   [view file]

Pekov I V (2007) New minerals from former Soviet Union countries, 1998-2006: new minerals approved by the IMA commission on new minerals and mineral names, Mineralogical Almanac, 11, 9-51   [view file]

Hawthorne F C, Oberti R, Harlow G E, Maresch W V, Martin R F, Schumacher J C, Welch M D (2012) Nomenclature of the amphibole supergroup, American Mineralogist, 97, 2031-2048   [view file]