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Lueshite crystals - click for larger pic
Lueshite crystals
© Gilles Haineault

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

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Home > Mineral Descriptions > Lueshite - (2 Photos)



Lueshite
NaNbO3

     Lueshite, a member of the perovskite group, occurs rarely at
Mont Saint-Hilaire.

PHYSICAL CHARACTERISTICS:

Color is usually black.
Luster is submetallic.
Diaphaneity is opaque.
Crystal System is isometric; (??).
Crystal Habits include small pseudo-cubic crystals to 1.5mm
   and deformed pseudo-octahedra.
Cleavage {001} is easy.
Fracture is conchoidal.
Hardness is 5.5
Specific Gravity is approximately 4.5 g/cm3.
Streak is gray.
Associated Minerals include aegirine, albite, eudialyte, griceite,
   lovozerite, pectolite, sodalite, sphalerite, steenstrupine,
   ussingite and villiaumite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1959 after its discovery locality at Lueshe,
   north of Goma, Zaire.

CLASSIFICATION:

Dana System
# 4.3.3.4

Strunz Classification
# IV/C.10-60

REFERENCES:
MinRec 21:321 (1990), Dana 8:224 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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