About: dbkwik:resource/KbjwviB7Xo2TDQshuw1-Xw==   Sponge Permalink

An Entity of Type : dbkwik:resource/6IIoeMLPkySiK--1vpcViQ==, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

AttributesValues
rdf:type
rdfs:label
  • Chapmanite
rdfs:comment
  • Chapmanite is a rare silicate mineral belonging to the nesosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman, 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 colour. Early German texts have referred to the mineral as antimon-hypochlorite.
sameAs
dcterms:subject
dbkwik:ceramica/pr...iPageUsesTemplate
mohs
  • 25(xsd:integer)
Gravity
  • 369(xsd:integer)
Name
  • Chapmanite
Caption
  • Yellow-green earthy massive chapmanite
streak
  • Yellowish green
formula
  • Fe2Sb2
System
  • Monoclinic-domatic
pleochroism
  • None
Color
  • Yellow, green, olive green
cleavage
  • Poor
habit
  • Earthy massive; granular
fracture
  • Conchoidal to irregular
refractive
  • nα=1.850 nβ=1.950 nγ=1.960
luster
  • Nonmetallic, dull to adamantine
abstract
  • Chapmanite is a rare silicate mineral belonging to the nesosilicate group, discovered in 1924, and named in honour of the late Edward John Chapman, 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 colour. 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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