TY - JOUR
T1 - Adanite, a new lead-tellurite-sulfate mineral from the North Star mine, Tintic, Utah, and Tombstone, Arizona, USA
AU - Kampf, Anthony R.
AU - Housley, Robert M.
AU - Rossman, George R.
AU - Yang, Hexiong
AU - Downs, Robert T.
N1 - Funding Information:
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.
Publisher Copyright:
© 2020 Mineralogical Association of Canada. All rights reserved.
PY - 2020/5/1
Y1 - 2020/5/1
N2 - Adanite, Pb2(Te4þO3)(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 a = 1.90(1), b = 2.04(calc), c = 2.08(calc), 2V(meas) = 54(1)8. 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 Pb1.89Sb3+0.02Te4+0.98S6+1.04Cl0.02O6.98. The mineral is monoclinic, space group P21/n, with a = 7.3830(3), b = 10.7545(5), c = 9.3517(7) Å, b = 111.500(8)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)101, 3.454(80)211; 122; 200, 3.301(100)202; 031; 210, and 3.048(73)ð112; 221; 113. The structure (R1 = 0.022 for 1906 I . 2rI 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.
AB - Adanite, Pb2(Te4þO3)(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 a = 1.90(1), b = 2.04(calc), c = 2.08(calc), 2V(meas) = 54(1)8. 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 Pb1.89Sb3+0.02Te4+0.98S6+1.04Cl0.02O6.98. The mineral is monoclinic, space group P21/n, with a = 7.3830(3), b = 10.7545(5), c = 9.3517(7) Å, b = 111.500(8)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)101, 3.454(80)211; 122; 200, 3.301(100)202; 031; 210, and 3.048(73)ð112; 221; 113. The structure (R1 = 0.022 for 1906 I . 2rI 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.
KW - Adanite
KW - Arizona
KW - Crystal structure
KW - New mineral
KW - North Star mine
KW - Raman spectroscopy
KW - Sulfate
KW - Tellurite
KW - Tintic
KW - Tombstone
KW - USA
KW - Utah
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U2 - 10.3749/canmin.2000010
DO - 10.3749/canmin.2000010
M3 - Article
AN - SCOPUS:85090990773
VL - 58
SP - 403
EP - 410
JO - Canadian Mineralogist
JF - Canadian Mineralogist
SN - 0008-4476
IS - 3
ER -