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Ilmenorutile crystals - click for larger pic
Ilmenorutile crystals
© Modris Baum

Ilmenorutile crystals - click for larger pic
Ilmenorutile crystals
© Doug Merson

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Home > Mineral Descriptions > Ilmenorutile - (2 Photos)



Ilmenorutile
(Ti,Nb,Ta,Fe3+, Fe2+)O2

     Ilmenorutile is discredited by the IMA during a vast revision of pre-IMA (1959) species. Ilmenorutile is Nb-bearing rutile.

PHYSICAL CHARACTERISTICS:

Color is usually dark gray.
Luster is sub-metallic.
Diaphaneity is opaque.
Crystal System is tetragonal; P42mnm.
Crystal Habits include irregular clusters of prismatic crystals.
Cleavage [110] is distinct, [100] is imperfect.
Fracture is conchoidal.
Hardness is 6 -6.5
Specific Gravity is approximately 4.75 g/cm3.
Streak is grayish to greenish-black.
Associated Minerals include albite, franconite, microcline,
   rhodochrosite, rutile and siderite.
Distinguishing Features: Crystal habit, color and luster.
Origin: Named in 1854 after its discovery locality, at Miask, Ilmen
   Mountains, Russia and its similarity to rutile.

CLASSIFICATION:

Dana System
# 4.4.1.2

Strunz Classification
# IV/D.03-10

REFERENCES:
Dana 8:237 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
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PE
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AP
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MX
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SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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