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Leucophanite crystals - click for larger pic
Leucophanite rosette
Cynthia Peat sp.
Photo by Violet Anderson
© Royal Ontario Museum

Leucophanite crystals - click for larger pic
Leucophanite crystals
Photo by Violet Anderson
© Royal Ontario Museum

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

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

Leucophanite crystals - click for larger pic
Leucophanite crystals
© Quintin Wight

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Home > Mineral Descriptions > Leucophanite - (9 Photos)



Leucophanite
(Na,Ca)2BeSi2(O,OH,F)7

     Leucophanite is a moderately common mineral at MSH. Mont Saint-Hilaire is the source of some of the finest and largest crystals for the species.

PHYSICAL CHARACTERISTICS:

Color is usually pale to lemon-yellow, white, beige, yellow-green
   and pale green.
Luster is vitreous to dull.
Diaphaneity is transparent, opaque for the pseudo-cubic crystals,
    rosettes and compact spheres.
Crystal System is triclinic; P1.
Crystal Habits include sharp pseudocubic crystals to 5mm, as
   twinned elongated crystals to 12mm, as superb twinned square
   tabular crystals to 4cm, and as rounded flakes to 2mm and rosettes.
Cleavage {001} is perfect, {100} and {010} are distinct.
Fracture is uneven.
Hardness is 4.
Specific Gravity is approximately 2.96 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, analcime, ancylite,
   astrophyllite, behoite, catapleiite, epididymite, fluorite, genthelvite,
   microcline, natrolite, rhabdophane, rhodochrosite and sérandite.
Distinguishing Features: Crystal habit and color.
Origin: Named in 1840 from the Greek leukos, white, plus phainesthai,
   to appear, alluding to its whitish reflection in certain lights.

CLASSIFICATION:

Dana System
# 55.4.2.4

Strunz Classification
# VIII/C.02-50

REFERENCES:
MinRec 21:318 (1990), Dana 8:1146 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
¤¤

AP
--

MX
¤¤

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

Legend

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

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

Leucophanite crystals - click for larger pic
Leucophanite crystals
© Steven Stuart

Leucophanite crystals - click for larger pic
Leucophanite crystals
© Steven Stuart