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Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A.

Kampf, Anthony R. and Housley, Robert M. and Marty, Joe (2017) Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A. Canadian Mineralogist, 55 (5). pp. 867-873. ISSN 0008-4476. https://resolver.caltech.edu/CaltechAUTHORS:20171011-092732591

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Abstract

Dagenaisite, Zn_3Te^(6+)O_6, is a new mineral from the Gold Chain mine, Tintic district, Juab County, Utah, U.S.A. It is a late-stage secondary phase formed by the oxidative alteration of earlier Te- and Zn-bearing minerals. It is associated with cinnabar, dugganite, eurekadumpite, and gold in vugs in a matrix composed of quartz and dolomite. The mineral occurs as tiny light greenish-gray platelets, generally intermixed with amorphous material, forming porous masses that are apparently replacements of earlier phases. The streak is white, the luster is pearly, and crystals are transparent to translucent. The hardness could not be measured, but appears to be <2 (Mohs). The tenacity is flexible, the fracture is irregular, and cleavage was not observed. The calculated density is 6.00 g/cm^3 for the empirical formula. At room temperature, the mineral is slowly soluble in dilute HCl and rapidly soluble in concentrated HCl. Optical properties could not be determined. Electron-microprobe analyses gave the empirical formula (Zn_(2.39)Cu_(0.36)Ca_(0.06)Mn_(0.03)As_(0.03)Si_(0.02))_(Σ2.89)Te_(1.02)O_6. The mineral is monoclinic, space group C2/c, with cell parameters a 14.87(2), b 8.88(2), c 10.37(2) Å, β 93.33(2)°, V 1367(4) Å^3, and Z = 12. The five strongest lines in the X-ray powder diffraction patterns are [d_(obs) Å(I)(hkl)]: 4.311(30)(310), 3.029(44)(222), 2.744(68) (313, 421), 2.539(100) (132, 422), and 1.6568(48) (732, 350, 244). The mineral is the natural counterpart of synthetic Zn_3Te^(6+)O_6, which has a structure based on an approximate close packing of O atoms in an hhchhc sequence along [100].


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3749/canmin.1700037 DOIArticle
http://www.canmin.org/content/55/5/867PublisherArticle
http://canmin.geoscienceworld.org/content/55/5/867PublisherArticle
Additional Information:© 2017 Mineralogical Association of Canada. Received May 26, 2017. Revised manuscript accepted July 24, 2017. Reviewers Stuart Mills and Andrew Christy are thanked for their constructive comments on the manuscript. The microprobe analyses were funded by a grant to Caltech from the Northern California Mineralogical Society. The rest of this study was funded by the John Jago Trelawney Endowment to the Mineral Sciences Department of the Natural History Museum of Los Angeles County.
Funders:
Funding AgencyGrant Number
Northern California Mineralogical SocietyUNSPECIFIED
John Jago Trelawney EndowmentUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20171011-092732591
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20171011-092732591
Official Citation:Anthony R. Kampf, Robert M. Housley, and Joe Marty Dagenaisite, A New Zinc Tellurate From the Gold Chain Mine, Tintic, Utah, U.S.A. Can Mineral 2017 55:867-873; doi:10.3749/canmin.1700037
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:82277
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:11 Oct 2017 18:00
Last Modified:03 Oct 2019 18:52

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