posnjakite
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Posnjakite is a hydrated copper sulfate mineral. It was discovered in the Tungsten deposit of Nura-Taldy in Karaganda Region in Kazakhstan and described in 1967 by Aleksandr Ivanovich Komkov (1926–1987) and Yevgenii Ivanovich Nefedov (1910–1976) and named after geochemist Eugene Valdemar Posnjak (1888–1949).
In the Vinony graph
Within Vinony's link graph, posnjakite is referenced by 7 other articles, and connects out to Kazakhstan, tungsten and Wayback Machine.
Vinony files it under Copper(II) minerals, Minerals described in 1967 and Minerals in space group 7.
Its subject is documented across 11 Wikipedia language editions.
Key facts
- Mineral.name
- Posnjakite
- Mineral.category
- Copper minerals
- Mineral.image
- Posnjakite-113800.jpg
- Mineral.caption
- Posnjakite from Špania Dolina in Slovakia
- Mineral.formula
- Cu4[(OH)6SO4] • H2O
- Mineral.IMAsymbol
- Pnk
- Mineral.molweight
- 488.32 g/mol
- Mineral.strunz
- 7.DD.10
- Mineral.dana
- 31.4.1.1
- Mineral.system
- Monoclinic
- Mineral.class
- Domatic (m) (same H-M symbol)
- Mineral.symmetry
- Pa
- Mineral.unit cell
- a = 10.578 Å, b = 6.345 Å, c = 7.863 Å; β = 117.98°; Z = 2
- Mineral.color
- Sky-blue to dark-blue
- Mineral.habit
- Crystals scaly, or as crusts; earthy
- Mineral.mohs
- 2 to 3
- Mineral.luster
- Vitreous
- Mineral.refractive
- nα = 1.625 nβ = 1.680 nγ = 1.706
via Wikipedia infobox
Wikidata facts
- Image
- Posnjakite-113800.jpg
Show 7 more facts
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 7.DD.10
- Commons category
- Posnjakite
- Nickel-Strunz 9th edition (updated 2009)
- 7.DD.10
- crystal system
- monoclinic crystal system
- IMA Mineral Symbol
- Pnk
- chemical formula
- Cu₄SO₄(OH)₆·H₂O
- Strunz 8th edition (series ID, updated)
- VI/D.01
Sources (1)
via Wikidata · CC0
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Encyclopedic overview
2 sectionsContents
- Occurrence
- References
Posnjakite is a hydrated copper sulfate mineral. It was discovered in the Tungsten deposit of Nura-Taldy in Karaganda Region in Kazakhstan and described in 1967 by Aleksandr Ivanovich Komkov (1926–1987) and Yevgenii Ivanovich Nefedov (1910–1976) and named after geochemist Eugene Valdemar Posnjak (1888–1949).
== Occurrence == Posnjakite is an uncommon but widespread secondary mineral in the oxidised zone of copper sulfide deposits, which may be of post-mine formation. It is associated with brochantite, langite, devilline, serpierite, woodwardite, wroewolfeite, aurichalcite, azurite, malachite and chalcopyrite.
Excerpted from Wikipedia’s “posnjakite” article, available under the CC BY-SA 4.0 licence.
Available in 11 languages
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