A Caltech Library Service

Northstarite, a new lead-tellurite-thiosulfate mineral from the North Star mine, Tintic, Utah, USA

Kampf, Anthony R. and Housley, Robert M. and Rossman, George R. (2020) Northstarite, a new lead-tellurite-thiosulfate mineral from the North Star mine, Tintic, Utah, USA. Canadian Mineralogist, 58 (4). pp. 533-542. ISSN 1499-1276. doi:10.3749/canmin.1900105.

[img] Crystallographic Info File (CIF) (Northstarite) - Supplemental Material
See Usage Policy.


Use this Persistent URL to link to this item:


Northstarite, Pb₆ (Te⁴⁺O₃)₅(S₂O₃), is a new mineral from the North Star mine, Tintic district, Juab County, Utah, USA. It is an oxidation-zone mineral occuring in a vug in massive quartz-baryte-enargite-pyrite in association with anglesite, azurite, chrysocolla, fluorapatite, plumbogummite, tellurite, zincospiroffite, and the new mineral adanite. Crystals are beige short prisms with pyramidal terminations, up to about 1 mm in length. The mineral is transparent to translucent with adamantine luster, white streak, Mohs hardness 2, brittle tenacity, irregular fracture, and no cleavage. The calculated density is 6.888 g/cm³. Northstarite is uniaxial (–) and nonpleochroic. The Raman spectrum is consistent with the presence of tellurite and thiosulfate groups and the absence of OH and H₂O. Electron-microprobe analyses gave the empirical formula Pb_(5.80)Sb³⁺_(0.05)Te⁴⁺_(5.04)S⁶⁺_(1.02)S²⁻_(1.02)O₁₈. The mineral is hexagonal, space group P6₃, with a = 10.2495(5), c = 11.6677(8) Å, V = 1061.50(13) ų, and Z = 2. The five strongest X-ray powder diffraction lines are [d_(obs) Å(I)(hkl)]: 3.098(100)(113), 2.957(88)(300), 2.140(42)(223), 1.7335(41)(413), and 1.6256(31)(306). The structure (R₁ = 0.033 for 1476 I > 2σI reflections) is a framework constructed of short (strong) Pb–O and Te–O bonds with channels along the 6₃ axes. The thiosulfate groups at the centers of the channels are only weakly bonded to the framework.

Item Type:Article
Related URLs:
URLURL TypeDescription
Kampf, Anthony R.0000-0001-8084-2563
Rossman, George R.0000-0002-4571-6884
Additional Information:© 2020 Mineralogical Association of Canada. Received January 2, 2020. Revised manuscript accepted April 28, 2020. Owen Missen and an anonymous reviewer are thanked for their constructive comments on the manuscript. Mark Cooper is thanked for helpful suggestions regarding the structure solution and refinement. 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.
Funding AgencyGrant Number
Northern California Mineralogical SocietyUNSPECIFIED
John Jago Trelawney EndowmentUNSPECIFIED
Issue or Number:4
Record Number:CaltechAUTHORS:20201027-132504948
Persistent URL:
Official Citation:Anthony R. Kampf, Robert M. Housley, George R. Rossman; Northstarite, a new lead-tellurite-thiosulfate mineral from the North Star mine, Tintic, Utah, USA. The Canadian Mineralogist ; 58 (4): 533–542. doi:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:106303
Deposited By: Tony Diaz
Deposited On:27 Oct 2020 20:55
Last Modified:16 Nov 2021 18:52

Repository Staff Only: item control page