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Neighborite crystal
© Doug Merson
Neighborite crystals
© Doug Merson
Neighborite crystals
© Stephan Wolfsried
Neighborite crystals
© Modris Baum
NaMgF
Neighborite is very rare at Mont Saint-Hilaire.
PHYSICAL CHARACTERISTICS:
Color is usually dark red, reddish brown.
Luster is vitreous; dull to greasy.
Diaphaneity is transparent to translucent.
Crystal System is orthorhombic; Pnma
Crystal Habits include pseudo-octahedral and pseudocuboctahedral
crystals to 2mm, pseudocubic crystals to 3mm.
Cleavage is not apparent.
Fracture is uneven.
Hardness is 4.5
Specific Gravity is approximately 3.0 g/cm
Streak is white.
Associated Minerals include aegirine, brookite, calcite, catapleiite,
dolomite, epididymite, fluorite, mckelveyite, microcline, pyrophanite,
rutile and siderite.
Distinguishing Features: Crystal habit.
Origin: Named in 1961 after Frank Neighbor (b. 1906), American
petroleum geologist.
CLASSIFICATION:
Dana System
# 11.1.1.1
Strunz Classification
# III/C.03-70
REFERENCES:
MinRec 21:325-326 (1990), Dana 8:407 (1997)
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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Neighborite crystals
© Jason B. Smith
Neighborite crystals
© Stephan Wolfsried