Zinclipscombite

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Zinclipscombite
Zinclipscombite-104316.jpg
Zinclipscombite: Pale green balls and crystal clusters. Silver Coin Mine, Valmy, Iron Point District, Humboldt Co., Nevada, US
General
Category Phosphate mineral
Formula
(repeating unit)
Zn(Fe3+)2(PO4)2(OH)2
Strunz classification 8.BB.90
Dana classification 41.10.02.02
Crystal system Tetragonal
Crystal class Trapezohedral (422)
H-M symbol: (4 2 2)
Space group P43212
Unit cell a = 7.242, c = 13.125 [Å]; Z = 4
Identification
Formula mass 386.04 g/mol
Color Dark green to brown
Cleavage None
Fracture Brittle
Mohs scale hardness 5
Luster Vitreous
Streak Light green to tan
Diaphaneity Translucent
Specific gravity 3.65
Optical properties Uniaxial
Refractive index nω=1.755, nε=1.795
Birefringence 0.0400
References [1][2]

Zinclipscombite is a dark green to brown zinc iron phosphate mineral with formula: Zn(Fe3+)2(PO4)2(OH)2.[1][2] It occurs as fibrous spheres and exhibits tetragonal crystal structure.[1]

In the classification of minerals zinclipscombite is in the lipscombite group, which also includes lipscombite.

Discovery[edit]

The mineral zinclipscombite was discovered and named by Chukanov, Pekov, Möckel, Zadov, and Dubinchuk [3][4] from a sample from the Silver Coin mine, Edna Mountain, Valmy, Humboldt County, Nevada, United States. The new mineral name was approved in 2006 by the Commission on New Minerals and Mineral Names, International Mineralogical Association.

References[edit]

  1. ^ a b c Mindat
  2. ^ a b WebMineral
  3. ^ Chukanov, N. V., Pekov, I. V., Möckel, S., Zadov, A. E., and Dubinchuk V. T. Zinclipscombite, ZnFe 23+ (PO4)2(OH)2, a new mineral species Geology of Ore Deposits, 49, 7, 509-513, doi:10.1134/S1075701507070033 [1]
  4. ^ Chukanov, N. V., Pekov, I. V., Möckel, S., Zadov, A. E., and Dubinchuk V. T. (2006): Zinclipscombite ZnFe3+2(PO4)2(OH)2 – a new mineral. Proceedings of the Russian Mineralogical Society, 135(6), 13–18. [2]

External links[edit]

Gallery of zinclipscombite pictures at mindat.org.