Boleite information

Boleite
Boleite
General
Category	Halide mineral
Formula; (repeating unit)	KPb26Ag9Cu24(OH)48Cl62
IMA symbol	Bol
Strunz classification	3.DB.15
Crystal system	Isometric
Crystal class	Hexoctahedral (m3m) ; H-M symbol: (4/m 3 2/m)
Space group	Pm3m
Unit cell	a = 15.29 Å; Z = 1
Identification
Color	Deep Prussian blue to indigo
Crystal habit	Cubic crystals
Cleavage	[001] perfect
Fracture	Uneven
Mohs scale hardness	3.0 – 3.5
Luster	Vitreous to pearly
Streak	Greenish blue
Diaphaneity	Translucent
Specific gravity	5.054
Optical properties	Isotropic
Refractive index	n = 2.05
Other characteristics	Radioactive 0.36% (K)
References

Boleite is a complex halide mineral with formula: KPb₂₆Ag₉Cu₂₄(OH)₄₈Cl₆₂.^[3] It was first described in 1891 as an oxychloride mineral. It is an isometric mineral which forms in deep-blue cubes. There are numerous minerals related to boleite, such as pseudoboleite, cumengite, and diaboleite, and these all have the same complex crystal structure.^[5] They all contain bright-blue cubic forms and are formed in altered zones of lead and copper deposits, produced during the reaction of chloride bearing solutions with primary sulfide minerals.^[6]

^ Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.
^ Handbook of Mineralogy
^ ^a ^b Mindat.org
^ Webmineral data
^ Martens, W., Williams, P.A., Frost, R.L. (2003) "Raman spectroscopy of the minerals boleite, cumengite, diaboleite and phosgenite – implications for the analysis of cosmetics of a antiquity". Mineralogical Magazine. V.67: 103–111 1^{[permanent dead link]}
^ Rouse, Roland C. (1973/01). "The Crystal Structure of boleite – A Mineral Containing Silver Atom Clusters". Journal of Solid State Chemistry 6(1): 86–92 2

[1] Warr, L.N. (2021). "IMA–CNMNC approved mineral symbols". Mineralogical Magazine. 85 (3): 291–320. Bibcode:2021MinM...85..291W. doi:10.1180/mgm.2021.43. S2CID 235729616.

[HBM-2] Handbook of Mineralogy

[Mindat-3] Mindat.org

[Webmin-4] Webmineral data

[5] Martens, W., Williams, P.A., Frost, R.L. (2003) "Raman spectroscopy of the minerals boleite, cumengite, diaboleite and phosgenite – implications for the analysis of cosmetics of a antiquity". Mineralogical Magazine. V.67: 103–111 1^{[permanent dead link]}

[Rouse-6] Rouse, Roland C. (1973/01). "The Crystal Structure of boleite – A Mineral Containing Silver Atom Clusters". Journal of Solid State Chemistry 6(1): 86–92 2

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