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Matthiasweilite, PbTe⁴⁺O₃, a New Tellurite Mineral from the Delamar Mine, Lincoln County, Nevada, USA

Kampf, Anthony R. and Missen, Owen P. and Mills, Stuart J. and Ma, Chi and Housley, Robert M. and Chorazewicz, Marek and Marty, Joe and Coolbaugh, Mark and Momma, Koichi (2022) Matthiasweilite, PbTe⁴⁺O₃, a New Tellurite Mineral from the Delamar Mine, Lincoln County, Nevada, USA. Canadian Mineralogist, 60 (5). pp. 805-814. ISSN 1499-1276. doi:10.3749/canmin.2200015.

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Matthiasweilite (IMA2021-069), Pb²⁺Te⁴⁺O₃, is a new mineral discovered at the Delamar mine, Lincoln County, Nevada, USA. It is a secondary mineral, associated with adanite, choloalite, northstarite, and other oxysalts in a quartz-rich matrix, that developed in an altered primary ore along with altaite, tetrahedrite-(Zn), native gold, and other sulfides and selenides. The mineral occurs as tightly intergrown masses of light yellow crystals. The streak is white, luster is adamantine, Mohs hardness is 2½, tenacity is brittle, and fracture is conchoidal; no obvious cleavage is present. The calculated density is 7.282 g/cm³ for the empirical formula. Data from electron probe microanalysis and assuming O = 3 gives the empirical formula Pb₀.₉₉Te⁴⁺₁.₀₁O₃. Matthiasweilite is triclinic, space group P1̅, with cell parameters a = 7.0256(4), b = 10.6345(6), c = 11.9965(8) Å, α = 78.513(6), β = 83.104(6), γ = 84.083(6)°, V = 869.10(9) ų, and Z = 10. The crystal structure (R₁ = 0.0523 for 3416 I > 2σI reflections) consists of Te⁴⁺O₃ trigonal pyramids that are linked via relatively short (<2.6 Å) Pb–O bonds to form a framework.

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URLURL TypeDescription
Kampf, Anthony R.0000-0001-8084-2563
Missen, Owen P.0000-0002-2121-9971
Ma, Chi0000-0002-1828-7033
Marty, Joe0000-0002-8638-3684
Momma, Koichi0000-0003-0659-0964
Alternate Title:Matthiasweilite, PbTe4+O3, a New Tellurite Mineral from the Delamar Mine, Lincoln County, Nevada, USA
Additional Information:An anonymous reviewer is thanked for constructive comments on the manuscript. This study was funded, in part, by the John Jago Trelawney Endowment to the Mineral Sciences Department of the Natural History Museum of Los Angeles County. Support funding has been provided to OPM by an Australian Government Research Training Program Scholarship, a Monash Graduate Excellence Scholarship, and a Robert Blackwood Monash-Museums Victoria scholarship. We also gratefully acknowledge Mihoko Maruyama (Osaka University) and the beamline scientists, especially Prof. Kiyofumi Nitta and Prof. Oki Sekizawa, at BL37XU, SPring-8, Japan, for their assistance.
Funding AgencyGrant Number
John Jago Trelawney EndowmentUNSPECIFIED
Australian GovernmentUNSPECIFIED
Monash UniversityUNSPECIFIED
Museums VictoriaUNSPECIFIED
Issue or Number:5
Record Number:CaltechAUTHORS:20221128-494241100.38
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ID Code:118076
Deposited By: Research Services Depository
Deposited On:16 Dec 2022 15:55
Last Modified:16 Dec 2022 21:32

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