Khinite, parakhinite, and dugganite, three new tellurates from Tombstone, Arizona

S. A. Williams

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Other| October 01, 1978

Khinite, parakhinite, and dugganite, three new tellurates from Tombstone, Arizona

S. A. Williams

Phelps Dodge Corp., Douglas, Ariz., United States

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Author and Article Information

S. A. Williams

Phelps Dodge Corp., Douglas, Ariz., United States

Publisher: Mineralogical Society of America

First Online: 02 Mar 2017

Online ISSN: 1945-3027

Print ISSN: 0003-004X

American Mineralogist (1978) 63 (9-10): 1016–1019.

Abstract

Khinite was found at the Old Guard mine, one piece known. It is Cu₃PbTeO₄(OH)₆, orthorhombic, Fddd, with a = 5.740, b = 9.983, с = 23.960A. Strongest lines are 2.491 (10), 3.451 (9), 4.866 (8), 2.996 (7), 2.204 (7), 2.818 (6), 1.916 (6), 1.558 (6). Dark green, H = 3½, D calc = 6.69g/cm³; α = 2.110, β = 2.112, γ = 2.165, 2V₂ = 20°.

Two pieces of parakhinite were found at the Emerald mine. Formula also Cu₃PbTeO₄(OH)₆, hexagonal P6₂22 with a = 5.753, с = 17.958A, thus с = ¾c of khinite. Strongest lines are 3.336 (10), 2.490 (10), 4.800 (8), 1.558 (8), 2.913 (7), 2.245 (6), 2.994 (5), 1.997 (5). Color, H, and D calc are identical to khinite; e = 2.120, ω = 2.155.

Several pieces of dugganite were found at three mines. Analysis gave Pb₃Zn3(TeO₆)_x(AsO₄)_2–x(OH)_6–x with x = 0.94 to 1.33. Hexagonal, perhaps P6/mmm, with a = 8.472, с = 5.208A; strongest lines are 3.284(10), 2.997(8), 2.446(6), 1.896(6), 1.603(6), 2.773(5), 1.177(5), 5.204(4). Colorless to various greens (with CuO = 0–1.5 percent), H = 3, G = 6.33, D calc = 6.33g/cm³; ω = 1.977, e = 1.967.