chapmanite
Sign in to saveChapmanite is a rare silicate mineral belonging to the phyllosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman (1821–1904), a geology professor at the University of Toronto. Chemically, it is an iron antimony silicate, closely related to bismutoferrite, and may contain aluminium impurities. It is closely associated with silver mines, most notably the Keeley mine in Ontario, Canada, found in quartz veinlets containing graphite in gneiss. It takes the form of a powdery, yellow-green, semitransparent solid, and leaves a streak of the same color. Early German
Key facts
- Mineral.name
- Chapmanite
- Mineral.category
- Phyllosilicate minerals
- Mineral.image
- Chapmanite.jpg
- Mineral.caption
- Yellow-green earthy massive chapmanite
- Mineral.formula
- Fe2Sb(SiO4)2(OH)
- Mineral.IMAsymbol
- Cpm
- Mineral.strunz
- 9.ED.25
- Mineral.system
- Monoclinic
- Mineral.class
- Domatic (m) (same H-M symbol)
- Mineral.symmetry
- Cm
- Mineral.color
- Yellow, green, olive green
- Mineral.habit
- Earthy massive; granular
- Mineral.cleavage
- Poor
- Mineral.fracture
- Conchoidal to irregular
- Mineral.mohs
- 2.5
- Mineral.luster
- Nonmetallic, dull to adamantine
- Mineral.refractive
- nα=1.850 nβ=1.950 nγ=1.960
- Mineral.pleochroism
- None
via Wikipedia infobox
Wikidata facts
- Image
- Chapmanite.jpg
Show 5 more facts
- IMA Mineral Symbol
- Cpm
- Strunz 8th edition (series ID, updated)
- VIII/A’.04
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 9.ED.25
- Commons category
- Chapmanite
- Nickel-Strunz 9th edition (updated 2009)
- 9.ED.25
Sources (2)
via Wikidata · CC0
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Article
1 sectionsContents
- References
Chapmanite is a rare silicate mineral belonging to the phyllosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman (1821–1904), a geology professor at the University of Toronto. Chemically, it is an iron antimony silicate, closely related to bismutoferrite, and may contain aluminium impurities. It is closely associated with silver mines, most notably the Keeley mine in Ontario, Canada, found in quartz veinlets containing graphite in gneiss. It takes the form of a powdery, yellow-green, semitransparent solid, and leaves a streak of the same color. Early German texts have referred to the mineral as antimon-hypochlorite.
It was recently rediscovered in the southern hemisphere at the abandoned Argent lead mine in Bushveld series rocks of South Africa.
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