Erythrite: Difference between revisions
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| references = <ref name=Handbook>{{cite web |last1=Anthony |first1=John W. |last2=Bideaux |first2=Richard A. |last3=Bladh |first3=Kenneth W. |last4=Nichols |first4=Monte C. |title=Erythrite |url=http://www.handbookofmineralogy.org/pdfs/erythrite.pdf |website=Handbook of Mineralogy |publisher=Mineral Data Publishing |access-date=27 July 2022 |date=2005}}</ref><ref name=Mindat>{{mindat|id=1407|access-date=27 July 2022|title=Erythrite}}</ref><ref name=Webmin>{{Cite web|last1=Barthelmy|first1=David|year=2014|url=http://www.webmineral.com/data/Erythrite.shtml|access-date=27 July 2022|title = Erythrite Mineral Data|website=Webmineral.com}}</ref> | | references = <ref name=Handbook>{{cite web |last1=Anthony |first1=John W. |last2=Bideaux |first2=Richard A. |last3=Bladh |first3=Kenneth W. |last4=Nichols |first4=Monte C. |title=Erythrite |url=http://www.handbookofmineralogy.org/pdfs/erythrite.pdf |website=Handbook of Mineralogy |publisher=Mineral Data Publishing |access-date=27 July 2022 |date=2005}}</ref><ref name=Mindat>{{mindat|id=1407|access-date=27 July 2022|title=Erythrite}}</ref><ref name=Webmin>{{Cite web|last1=Barthelmy|first1=David|year=2014|url=http://www.webmineral.com/data/Erythrite.shtml|access-date=27 July 2022|title = Erythrite Mineral Data|website=Webmineral.com}}</ref> | ||
}} | }} | ||
[[File:Erytryn (kwiat kobaltu) - Bou Azzer, Atlas, Maroko.jpg|thumb|Erythrite (cobalt flower) - Bou Azzer, Atlas Mountains, Morocco.]] | [[File:Erytryn (kwiat kobaltu) - Bou Azzer, Atlas, Maroko.jpg|thumb|Erythrite (cobalt flower) - Bou Azzer, Atlas Mountains, Morocco.]] | ||
'''Erythrite''', also known as '''red cobalt''', previously ''[[cobalt ochre]]''<ref name="kriv">''Krivovichev V. G.'' Mineralogical glossary. Scientific editor [[:uk:Булах Андрій Глібович|A. G. Bulakh]]. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0</ref>{{rp|172}} is a secondary hydrated cobalt [[arsenate mineral]] with the formula {{chem|Co|3|(As|O|4|)|2|•8H|2|O}}. Erythrite and [[annabergite]], chemical formula {{chem|Ni|3|(As|O|4|)|2|•8H|2|O}}, or [[nickel]] arsenate form a complete series with the general formula {{chem|(Co|,Ni)|3|(As|O|4|)|2|•8H|2|O}}. | '''Erythrite''', also known as '''red cobalt''', previously ''[[cobalt ochre]]''<ref name="kriv">''Krivovichev V. G.'' Mineralogical glossary. Scientific editor [[:uk:Булах Андрій Глібович|A. G. Bulakh]]. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0</ref>{{rp|172}} is a secondary hydrated cobalt [[arsenate mineral]] with the formula {{chem|Co|3|(As|O|4|)|2|•8H|2|O}}. Erythrite and [[annabergite]], chemical formula {{chem|Ni|3|(As|O|4|)|2|•8H|2|O}}, or [[nickel]] arsenate form a complete series with the general formula {{chem|(Co|,Ni)|3|(As|O|4|)|2|•8H|2|O}}. | ||
Latest revision as of 01:23, 17 October 2025
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Erythrite, also known as red cobalt, previously cobalt ochre[1]Template:Rp is a secondary hydrated cobalt arsenate mineral with the formula Template:Chem/link. Erythrite and annabergite, chemical formula Template:Chem/link, or nickel arsenate form a complete series with the general formula Template:Chem/link.
Erythrite crystallizes in the monoclinic system and forms prismatic crystals. The color is crimson to pink and occurs as a secondary coating known as cobalt bloom on cobalt arsenide minerals. Well-formed crystals are rare, with most of the mineral manifesting in crusts or small reniform aggregates.
Erythrite was first described in 1832 for an occurrence in Grube Daniel, Schneeberg, Saxony,[2] and takes its name from the Greek έρυθρος (erythros), meaning red.[3] Historically, erythrite itself has not been an economically important mineral, but the prospector may use it as a guide to associated cobalt and native silver.Script error: No such module "Unsubst".
Erythrite occurs as a secondary mineral in the oxide zone of Co–Ni–As bearing mineral deposits. It occurs in association with cobaltite, skutterudite, symplesite, roselite-beta, scorodite, pharmacosiderite, adamite, morenosite, retgersite, and malachite.[4]
Notable localities are Cobalt, Ontario; La Cobaltera, Chile, Schneeberg, Saxony, Germany; Joachimsthal, Czech Republic; Cornwall, England; Bou Azzer, Morocco; the Blackbird mine, Lemhi County, Idaho; Sara Alicia mine, near Alamos, Sonora, Mexico; Mt. Cobalt, Queensland and the Dome Rock copper mine, Mingary, South Australia.[4]
Other varieties
The nickel variety, annabergite, occurs as a light green nickel bloom on nickel arsenides. In addition iron, magnesium and zinc can also substitute for the cobalt position, creating three other minerals: parasymplesite (Fe), hörnesite (Mg) and köttigite (Zn).
References
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- ↑ Krivovichev V. G. Mineralogical glossary. Scientific editor A. G. Bulakh. — St.Petersburg: St.Petersburg Univ. Publ. House. 2009. — 556 p. — ISBN 978-5-288-04863-0
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Further reading
- Dana's Manual of Mineralogy Template:ISBN
- Manual of Mineral Science, 22nd Ed. C. Klein.Template:ISBN
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