Cesbronite

Cesbronite is a copper-meteatellurate oxysalt mineral with the chemical formula Cu₃Te⁶⁺O₄(OH)₄ (IMA 17-C). It is colored green and its crystals are orthorhombic dipyramidal. Cesbronite is rated 3 on the Mohs Scale.^[3] It is named after Fabien Cesbron (born 1938), a French mineralogist.^[4]

Cesbronite
Emerald green crystal aggregates of cesbronite from Tombstone District, Cochise County, Arizona, USA
General
Category	Copper-tellurium oxysalt
Formula	Cu3Te6+O4(OH)4
IMA symbol	Ces[1]
Strunz classification	4.JN.15
Dana classification	34.7.2.1
Crystal system	Orthorhombic
Crystal class	Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
Space group	Pbcn
Unit cell	a = 8.624, b = 11.878 c = 5.872 [Å], Z = 2
Identification
Color	Green
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	[2]

Occurrence

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.^[5] It is often associated with argentian gold, teineite, carlfriesite, xocomecatlite, utahite, leisingite, jensenite and hematite.^[6]

See also

• List of minerals named after people
• List of minerals