| Abstract: | Durangite, associated with cassiterite, hematite, quartz, tridymite, cristobalite and clinopyroxene, occurs in small veinlets within flows, ash-flow tuffs and lithic tuffs in a tin mine near Boiler Peak, New Mexico. It is clear to semi-translucent, pale yellow-orange to medium orange-red with a vitreous lustre, pale yellow streak; H. 5-5.5%; irregular to conchoidal fracture and a good (110) cleavage; elongate along c with (110), (010), (021) and (111) the prominent forms; Dmeas 3.90, Dcalc 3.92 g/cm3; alpha medium yellow orange 1.634(3), beta pale yellow orange 1.663(3), gamma colourless 1.685(3); weak to moderate dispersion r < v. The structural formula is: (Na0.93Li0.07)SIGMA 1.00(Al0.89Fe0.07Mn0.06)SIGMA 1.02As0.99O4(F0.90(OH)0.07)SIGMA 0.97. Indexed XRD powder data are tabulated; a 6.574(1), b 8.505(2), c 7.019(1) A, beta 115.34o; space group C2/c; Z = 4. Additional X-ray and chemical data on durangite from Durango and Cornwall are also included.-L.T.T. |
| Genre: | Article |
| ProdID: | 70013102 |
| Citation Author: | Foord, E. E.; Oakman, M. R.; Maxwell, C. H. |
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| Citation End Page: | 246 |
| Citation Issue: | 2 |
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| Citation Language: | English |
| Citation Larger Work Title: | Canadian Mineralogist |
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| Citation Number Of Pages: | 6 |
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| Citation Search Results Text: | Durangite from the Black Range, New Mexico, and new data on durangite from Durango and Cornwall.; 1985; Article; Journal; Canadian Mineralogist; Foord, E. E.; Oakman, M. R.; Maxwell, C. H. |
| Citation Start Page: | 241 |
| Citation Volume: | 23 |
| Citation Year: | 1985 |
| Type: | citation/reference |
| Text: | Durangite from the Black Range, New Mexico, and new data on durangite from Durango and Cornwall.; 1985; Article; Journal; Canadian Mineralogist; Foord, E. E.; Oakman, M. R.; Maxwell, C. H. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Tue, 1 Jan 1985 00:00 -0600 |
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