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UM1969-15-Te:Ag

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Formula:
Ag-Te
contains some Cu
Colour:
gray with tan tint
Compositionally close to hessite, but the PXRD pattern is unique. Compare stützite, empressite, and 'UM1978-23-Te:Ag'.

As dense veinlets and vug fillings in vein quartz; molded against pyrite and veined by chalcopyrite and gold. From Gray Eagle mine, Boulder County, Colorado, USA.


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Physical Properties of UM1969-15-Te:AgHide

Colour:
gray with tan tint
Comment:
blue-gray when tarnished
Streak:
black
Hardness:
VHN30=39.6 - 86.2 kg/mm2 - Vickers
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Sub-Conchoidal

Chemical Properties of UM1969-15-Te:AgHide

Formula:
Ag-Te

contains some Cu

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.6O (m)
2.21 (vs)
2.15 (m)
2.10 (s)

Other InformationHide

Notes:
Etched by FeCl3 and HgCl2 -> iridescent to black; no reaction after 60 seconds with HNO3, HCl, KOH, KCN
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for UM1969-15-Te:AgHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kelly, W.C., Goddard, E.N. (1969): Telluride ores of Boulder County, Colorado.
Geol. Soc. Amer. Mem.: 109: 1-237 (esp. p. 107-109); in: Fleischer, M. (1970): New mineral names. American Mineralogist: 55: 1067-1073
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se/Valid2009_03.pdf (2016)

Internet Links for UM1969-15-Te:AgHide

 
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