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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
  • Wollastonite
rdfs:comment
  • Some of the properties that make wollastonite so useful are its high brightness and whiteness, low moisture and oil absorption, and low volatile content. Wollastonite is used primarily in ceramics, friction products (brakes and clutches), metalmaking, paint filler, and plastics.
sameAs
dcterms:subject
dbkwik:ceramica/pr...iPageUsesTemplate
Category
  • Silicate mineral
opticalprop
  • Biaxial
mohs
  • 45(xsd:integer)
Solubility
  • soluble in HCl, insoluble in water
Gravity
  • 286(xsd:integer)
Name
  • Wollastonite
streak
  • White
formula
  • Calcium silicate, CaSiO3
melt
  • 1540.0
System
  • triclinic bar 1
Color
  • white, colorless or gray
cleavage
  • perfect in two directions at near 90 degrees
habit
  • rare tabular crystals - commonly massive in lamellar, radiating, compact and fibrous aggregates.
diaphaneity
  • Transparent to translucent
fracture
  • splintery to uneven
refractive
  • nα = 1.616 - 1.640 nβ = 1.628 - 1.650 nγ = 1.631 - 1.653
luster
  • vitreous or dull to pearly on cleavage surfaces
birefringence
  • δ = 0.015 max
abstract
  • Some of the properties that make wollastonite so useful are its high brightness and whiteness, low moisture and oil absorption, and low volatile content. Wollastonite is used primarily in ceramics, friction products (brakes and clutches), metalmaking, paint filler, and plastics. Despite its chemical similarity to the compositional spectrum of the pyroxene group of minerals - where magnesium and iron substitution for calcium ends with diopside and hedenbergite respectively - it is structurally very different, with a third SiO4 tetrahedron in the linked chain (as opposed to two in the pyroxenes).
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