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Comments: Polished section (PPL) showing zoned crystal of cream-colored eucairite and pale lavender crookesite along with steel blue umangite and white ...
www.webmineral.com/data/Crookesite.shtml - 46k - Similar pages
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Crookesite is a selenide mineral composed of copper and selenium with variable thallium and silver. Its chemical formula is reported either as Cu7(Tl,Ag)Se4 ...
en.wikipedia.org/wiki/Crookesite - 24k - Similar pages
http://en.wikipedia.org/wiki/Crookesite
Dec 30, 2009 ... Crookesite mineral data, information about Crookesite, its properties and worldwide locations.
www.mindat.org/min-1159.html - 40k - Similar pages
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Fine-grained grey crookesite in white calcite matrix. ... 5 mm wide gray metallic crookesite, one of few Cu (I) selenide minerals and the only one ...
www.mindat.org/gallery.php?min=1159 - 12k - Similar pages
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http://www.mindat.org/gallery.php?min=1159
(4) Johan, Z. (1987) Crookesite, TlCu7Se4; new data and isotypism with ... Crookesite and sabatierite in a new light — a crystallographer's comment. Zeits. ...
www.handbookofmineralogy.org/pdfs/crookesite.pdf - Similar pages
http://www.handbookofmineralogy.org/pdfs/crookesite.pdf
Search crookesite on the Web. –noun. a rare mineral, selenide of copper, thallium, and silver, (Cu, Tl, Ag)2Se, occurring in steel-gray, compact masses. ...
dictionary.reference.com/browse/crookesite - 49k - Similar pages
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crookesite ( ′kru̇k′sīt ) ( mineralogy ) (Cu,Tl,Ag) 2 Se An important selenium mineral occurring in lead-gray masses and having a metallic.
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the more so for the mineral analogue crookesite [10] than for the stoi- ... crookesite [9, 10] yielded very good results, the analysis data on the ...
www.springerlink.com/index/H2K2447H220806H6.pdf - Similar pages
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while X-ray single-crystal diffraction data of crookesite refined better in the space group I4/m [7]. X-ray powder diffraction studies by Ohtani et al. ...
linkinghub.elsevier.com/retrieve/pii/S0925838800012020 - Similar pages
http://linkinghub.elsevier.com/retrieve/pii/S0925838800012020
The structure of TlCu7Se4 (synthetic crookesite) has been refined from X-ray ... Positional parameters of natural crookesite were refined from somewhat ...
adsabs.harvard.edu/abs/1991JSSCh..90...61E - Similar pages
http://adsabs.harvard.edu/abs/1991JSSCh..90...61E