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Howardevansite, NaCu (super 2+) Fe (super 3+) 2 (VO 4 ) (super 3-) 3 , a new fumarolic sublimate from Izalco Volcano, El Salvador; descriptive mineralogy ...
ammin.geoscienceworld.org/cgi/content/abstract/73/1-2/181 - Similar pages
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It was found that the composition of the phase of the howardevansite type structure, formed in the ... and howardevansite type structure. From the data pre- ...
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http://www.springerlink.com/index/X043RM4184273175.pdf
Both phases with the howardevansite type structure are products of a reaction between FeVO4 and ... howardevansite type structure is formed. An interesting ...
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Howardevansite occurs as euhedral, black tabular crystals up to 80 microns in ... Howardevansite is opaque and has a red-brown streak and metallic luster. ...
www.geo.mtu.edu/volcanoes/central_america/el_salvador/izal... - Similar pages
http://www.geo.mtu.edu/volcanoes/central_america/el_salvador/izalco/fumar.html
Vanadium oxides with a general formula A3+1.5x2+M4−x3+(VO4)6 crystallize also in another structure type of howardevansite, NaCuFe2(VO4)3 [7], or Fe7(PO4)6 ...
linkinghub.elsevier.com/retrieve/pii/S1293255802012797 - Similar pages
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The crystal structures of mineral howardevansite, NaCuFe2(VO4)3, and the isotypic synthetic compound β-Cu3Fe4(VO4)6 are described in the literature [1 and ...
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La howardevansite è un minerale. Indice. 1 Abito cristallino; 2 Origine e giacitura; 3 Forma in cui si presenta in natura; 4 Collegamenti esterni ...
it.wikipedia.org/wiki/Howardevansite - 26k - Similar pages
http://it.wikipedia.org/wiki/Howardevansite
howardevansite, and the substituent metals are also as- sumed to be fully oxidized. ... lected on single crystals of howardevansite. The first data set was ...
www.minsocam.org/ammin/AM73/AM73_181.pdf - Similar pages
http://www.minsocam.org/ammin/AM73/AM73_181.pdf
... Mixed valence compound, Howardevansite structure type ... β=108.35(1)°, γ= 101.64(1)° at 270K and adopts the well-known howardevansite structure type. ...
adsabs.harvard.edu/abs/2004JSSCh.177.1607R - Similar pages
http://adsabs.harvard.edu/abs/2004JSSCh.177.1607R
Howardevansite, NaCu2+Fe23+(VO4)33−, a new fumarolic sublimate from Izalco volcano, El Salvador: descriptive mineralogy and crystal structure ...
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