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Lamprophyllite crystals - click for larger pic
Lamprophyllite aggregates
L. Horváth sp.
Photo by Violet Anderson
© Royal Ontario Museum

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

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

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Home > Mineral Descriptions > Lamprophyllite - (3 Photos)



Lamprophyllite
Na2(Sr,Ba)2Ti3(SiO4)4(OH,F)2

     Lamprophyllite is a rare species from MSH, and is not distinguishable from its analog barytolamprophyllite.

PHYSICAL CHARACTERISTICS:

Color is usually pale yellow, orange, orange-yellow and brownish
   yellow.
Luster is vitreous to waxy or dull.
Diaphaneity is transparent to opaque.
Crystal System is monoclinic; C2/m.
Crystal Habits include fine fibrous and foliated thin strips to 2mm
   forming compact spheres, and as sharp bladed crystals to 4mm.
Cleavage {100} is perfect, micaceous.
Fracture is uneven.
Hardness is 2 - 3.
Specific Gravity is approximately 3.4 g/cm3.
Streak is pale brown to yellowish.
Associated Minerals include aegirine, albite, eudialyte, fluorite,
   nepheline, pectolite, sodalite and villiaumite.
Distinguishing Features: Crystal habit and luster.
Origin: Named in 1894 from the Greek lampros, shining, plus
   phyllon, leaf, alluding to its high luster and excellent cleavage.

CLASSIFICATION:

Dana System
# 56.2.6c.4

Strunz Classification
# VIII/C.13-30

REFERENCES:
MinRec 21:316 (1990), Dana 8:1175 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
--

MX
--

SS
--

MC
--

HF
--

BR
--

SX
¤¤

FR
--

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