Home > Mineral Descriptions > Ferrocolumbite - (1 Photo)



Ferrocolumbite
(Fe,Mn)(Nb,Ta)2O6

     Ferrocolumbite, a member of the columbite family, has been identified during the '97-'98 Winter. It had been XRD by Malcolm Back at the Royal Ontario Museum, and SEM probed by Robert Gault at the Canadian Museum of Nature.

PHYSICAL CHARACTERISTICS:

Color is usually black.
Luster is sub-metallic.
Diaphaneity is opaque.
Crystal System is orthorhombic; Pbcn.
Crystal Habits include prismatic crystals.
Cleavage {010} is distinct.
Fracture is subconchoidal to uneven.
Hardness is 6.
Specific Gravity is approximately 6.0 g/cm3.
Streak is brownish-black.
Associated Minerals include corundum, donnayite, gmelinite,
   gobbinsite, hercynite and phillipsite.
Distinguishing Features: Crystal habits, color and luster.
Origin: Named in 1802 to reflect its composition: the ferrous iron end -
   member of the series with ferrotantalite and manganocolumbite.

CLASSIFICATION:

Dana System
# 8.3.2.2

Strunz Classification
# IV/D.18-30

REFERENCES:
Dana 8:354-355 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend