Durangite from the Black Range, New Mexico, and new data on durangite from Durango and Cornwall.
Canadian Mineralogist
By: E.E. Foord, M.R. Oakman, and C. H. Maxwell
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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.
Suggested Citation
Foord, E., Oakman, M., and Maxwell, C.H., 1985, Durangite from the Black Range, New Mexico, and new data on durangite from Durango and Cornwall.: Canadian Mineralogist, v. 23, no. 2, p. 241-246.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Durangite from the Black Range, New Mexico, and new data on durangite from Durango and Cornwall. |
| Series title | Canadian Mineralogist |
| Volume | 23 |
| Issue | 2 |
| Year Published | 1985 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Canadian Mineralogist |
| First page | 241 |
| Last page | 246 |