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Neighborite crystals - click for larger pic
Neighborite crystal
© Doug Merson

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

Neighborite crystals - click for larger pic
Neighborite crystals
© Stephan Wolfsried

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

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Home > Mineral Descriptions > Neighborite - (7 Photos)



Neighborite
NaMgF3

     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/cm3.
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
¤¤¤

PE
¤¤

AP
--

MX
--

SS
--

MC
--

HF
¤¤

BR
--

SX
--

FR
--

Legend

Neighborite crystals - click for larger pic
Neighborite crystals
© Jason B. Smith

Neighborite crystals - click for larger pic
Neighborite crystals
© Stephan Wolfsried