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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 | ||||||||||||
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BROAD SCAN WITH SPECTRAL ARTIFACTS | ||||||||||||
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POWDER DIFFRACTION | |||||||
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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 |
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REFERENCES for Howardevansite | |
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American Mineralogist Crystal Structure Database Record: [view record] |
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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] |
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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] |
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