Cesbronite

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Cesbronite
General
Category Oxide mineral
Formula
(repeating unit)
Cu5(TeO3)2(OH)6 . 2H2O
Strunz classification 4.JN.15
Dana classification 34.7.2.1
Crystal system Orthorhombic
Crystal class Dipyramidal (mmm)
Unit cell a = 8.624, b = 11.878
c = 5.872 [Å], Z = 2
Identification
Color Green
Crystal symmetry Orthorhohombic
H-M symbol: (2/m 2/m 2/m)
Space group: Pbcn
Cleavage poor on {010}, good on {021}
Tenacity Brittle
Mohs scale hardness 3
Luster Subadamantine
Streak Green
Diaphaneity Translucent
Specific gravity 4.45 (measured)
Optical properties Biaxial (+)
Birefringence δ = 0.149
Pleochroism Distinct, various shades of green
2V angle 72o (calculated)
Ultraviolet fluorescence None
Solubility Soluble in HCl and HNO3. Insoluble in water
References [1][2][3][4][1]

Cesbronite is a copper tellurite hydroxide mineral with the chemical formula Cu5(TeO3 )2(OH)6 · 2 H2O. It is colored green and its crystals are orthorhombic dipyramidal. Cesbronite is rated 3 on the Mohs Scale.[2] It is named after Fabien Cesbron (born 1938), a French mineralogist.[3]

Occurrence[edit]

It was first found in the Bambollita ("La Oriental") mine in the Mexican state of Sonora. It also occurs in the Tombstone District of Cochise County, Arizona and the Tintic District of the East Tintic Mountains, Juab County, Utah.[4] It is often associated with argentian gold, teineite, carlfriesite, xocomecatlite, utahite, leisingite, jensenite and hematite.[5]

See also[edit]

References[edit]

  1. ^ Mineralienatlas
  2. ^ Webmineral entry
  3. ^ Williams, Sidney A. (1974). "Cesbronite, a new copper tellurite from Moctezuma, Sonora" (PDF). Mineralogical magazine. 39. Retrieved 2016-09-20. 
  4. ^ Mindat.org Cesbronite
  5. ^ "Handbook of mineralogy" (PDF). Retrieved 2016-09-20.