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Adanite, a new lead-tellurite-sulfate mineral from the North Star mine, Tintic, Utah, and Tombstone, Arizona, USA

Kampf, Anthony R. and Housley, Robert M. and Rossman, George R. and Yang, Hexiong and Downs, Robert T. (2020) Adanite, a new lead-tellurite-sulfate mineral from the North Star mine, Tintic, Utah, and Tombstone, Arizona, USA. The Canadian Mineralogist, 58 (3). pp. 403-410. ISSN 1499-1276. https://resolver.caltech.edu/CaltechAUTHORS:20200806-133624416

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Abstract

Adanite, Pb₂ (Te⁴⁺O₃)(SO₄), is a new oxidation-zone mineral from the North Star mine, Tintic district, Juab County, Utah, and from Tombstone, Cochise County, Arizona, USA. The characterization of the species is based principally on North-Star holotype material. Crystals are beige wedge-shaped blades, up to about 1 mm in length, in cockscomb intergrowths. The mineral is transparent with adamantine luster, white streak, Mohs hardness 2½, brittle tenacity, conchoidal fracture, and no cleavage. The calculated density is 6.385 g/cm³. Adanite is biaxial (–), with α = 1.90(1), β = 2.04(calc), γ = 2.08(calc), 2V(meas) = 54(1)°. The Raman spectrum is consistent with the presence of tellurite and sulfate groups and the absence of OH and H₂O. Electron-microprobe analyses gave the empirical formula Pb_(1.89)Sb³⁺_(0.02)Te⁴⁺_(0.98)S⁶⁺_(1.04)Cl_(0.02)O_(6.98). The mineral is monoclinic, space group P2₁/n, with a = 7.3830(3), b = 10.7545(5), c = 9.3517(7) Å, β = 111.500(8)°, V = 690.86(7) Å₃, and Z = 4. The four strongest X-ray powder diffraction lines are [dobs Å(I)(hkl)]: 6.744(47)⁠, 3.454(80)⁠, 3.301(100)⁠, and 3.048(73)⁠. The structure (R₁ = 0.022 for 1906 I > 2σI reflections) contains Te⁴⁺O₃ pyramids that are joined by short (strong) Pb–O bonds to form sheets. Interlayer SO₄ groups link the sheets via long Pb–O and Te–O bonds.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.3749/canmin.2000010DOIArticle
ORCID:
AuthorORCID
Kampf, Anthony R.0000-0001-8084-2563
Rossman, George R.0000-0002-4571-6884
Downs, Robert T.0000-0002-8380-7728
Additional Information:© 2020 Mineralogical Association of Canada. Associate Editor Maria Franca Brigatti and two anonymous reviewers are thanked for their constructive comments on the manuscript. At Caltech, the microprobe analyses and Raman studies were funded by grants from the Northern California Mineralogical Society and NSF grant EAR-1322082. 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
NSFEAR-1322082
John Jago Trelawney EndowmentUNSPECIFIED
Subject Keywords:Adanite, new mineral, tellurite, sulfate, crystal structure, Raman spectroscopy, North Star mine, Tintic, Utah, Tombstone, Arizona, USA
Issue or Number:3
Record Number:CaltechAUTHORS:20200806-133624416
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20200806-133624416
Official Citation:Anthony R. Kampf, Robert M. Housley, George R. Rossman, Hexiong Yang, Robert T. Downs; Adanite, a new lead-tellurite-sulfate mineral from the North Star mine, Tintic, Utah, and Tombstone, Arizona, USA. The Canadian Mineralogist ; 58 (3): 403–410. doi: https://doi.org/10.3749/canmin.2000010
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:104780
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:06 Aug 2020 20:54
Last Modified:15 Sep 2020 18:34

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