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Howardevansite R130739
Name: Howardevansite
RRUFF ID: R130739
Ideal Chemistry: NaCu2+Fe3+2(VO4)3
Locality: 'Y' Fumerol, Izalco Volcano, Sonsonate Department, El Salvador
Source: Rock Currier [view label]
Owner: RRUFF
Description: Black granular or tabular crystals embeded in thénardite, associated with black bladed or prismatic lyonsite. Crystal is twinned by a 2-fold rotation about [-1 -1 1].
Status: The identification of this mineral has been confirmed by single-crystal X-ray diffraction.
Mineral Group: [ Howardevansite (1) ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
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BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R130739
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
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Raman Data (Processed)
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R130739.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 8.186(4)Å    b: 9.704(4)Å    c: 6.627(3)Å
alpha: 103.61(2)°    beta: 102.09(3)°    gamma: 106.59(2)°   Volume: 468.2(2)Å3    Crystal System: triclinic
  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 Howardevansite

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]

Hughes J M, Drexler J W, Campana C F, Malinconico M L (1988) Howardevansite, NaCu2+Fe3+2(VO4)3-3, a new fumarolic sublimate from Izalco volcano, El Salvador: descriptive mineralogy and crystal structure, American Mineralogist, 73, 181-186   [view file]