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Hexagonite

UNB-2017-0018Minerals » Silicates » Inosilicates

Description

Sample of lilac compact/fibrous Hexagonite with a vitreous lustre. Hexagonite (Ca2(Mg,Fe)5Si8O22(OH)2) is the name for pink or lilac Tremolite. Lustre can vitreous or silky and streak is colourless. Hardness is 5 to 6 and cleavage is perfect in two directions forming a diamond shape. Hexagonite is usually found as fibrous, radiating aggregates, bladed but can also be compact.

Specifications

Object nameHexagonite
IDUNB-2017-0018
Legal statusPermanent collection
CategoryMineral
Classification
Mineral group:
Silicates
Sub-group:
Inosilicates
Composition
  • MgSiO3
  • Na2Fe2+5[Si12O30]
  • (Na,Ca)Fe3+Si2O6
  • NaFe3+Si2O6
  • NaFe3+Si2O6
  • A0-1B2C5T8O22(OH,F,Cl)2
  • NaAlSi2O6
  • Mg2Si2O6
  • CaMgSi2O6
  • CaFeSi2O6
  • CaSiO3
  • Ca2(Mg,Fe2+,Fe3+,Al)5(Si,Al)8O22(OH)2
  • Ca2(Mg5.0-4.5Fe2+0.0-0.5)Si8O22(OH)2
  • LiAlSi2O6
  • MnSiO3
  • (Mn,Fe)SiO3
  • ADSi2O6
  • Ca2Al(AlSi3O10)(OH)2·H2O
  • (Ca,Na)(Mg,Fe)Si2O6
  • NaCa2Si3O8(OH)2H2O
  • Mg2Mg5Si8O22(OH)2
OriginFowler, New York, U.S.A.
Pieces1
PartialNo
Measurements
  • 4cm x 9cm x 6cm

Map of Origin

Publications

  • Chesterman, C.W. 1979. Audubon Society, Field Guide to North American Rocks and Minerals. Knopf.