Earth Sciences
Collections

Allanite

UNB-2016-0432Minerals » Silicates » Sorosilicates

Description

Six samples of black tabular crystals encrusted with sediment. Allanite ((CaCe)(AlAlFe2+)O(Si2O7)(SiO4)(OH)) is a brown or black mineral with a vitreous or resinous lustre. Streak is grey and hardness is 5 1/2 to 6. Cleavage is poor. Allanite usually occurs as tabular, prismatic or granular crystals. https://www.mindat.org/min-125.html https://en.wikipedia.org/wiki/Allanite

Specifications

Object nameAllanite
IDUNB-2016-0432
Legal statusPermanent collection
CategoryMineral
Classification
Mineral group:
Silicates
Sub-group:
Sorosilicates
Composition
  • Ca2(Al,Fe)3(SiO4)3(OH)
  • (Al,Fe)SiO4
  • Ca2Al3(SiO4)3(OH)
  • Ca2Al3(SiO4)3(OH)
OriginOlden Township, Ontario, Canada
Pieces6
PartialNo
Measurements
  • 9.5cm x 6.8cm x 5.6cm
  • 8.6cm x 5.7cm x 4.3cm
  • 7.2cm x 5.1cm x 4.6cm
  • 4.8cm x 3.5cm x 2.1cm
  • 6.2cm x 4.8cm x 5.1cm
  • 6.3cm x 4.8cm x 2.7cm

Map of Origin