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Martinite crystals
© Gilles Haineault
Martinite crystals
© Doug Merson
Martinite crystals
© Modris Baum
(Na, ,Ca)11Ca(Si,S,B)1440 · 4H
Martinite is a new addition for Mont Saint-Hilaire, more data will be available upon publication of the description.
PHYSICAL CHARACTERISTICS:
Color is purple, lilac or colourless
Luster is vitreous.
Diaphaneity is transparent.
Crystal System is triclinic, 1.
Crystal Habits include sub- to euhedral plates measuring < 10 µm in
thickness and up to 50 µm across. Occurs both as single crystals
and as rosettes.
Cleavage {010} perfect.
Fracture is uneven.
Hardness is ~ 4.
Specific Gravity is ~ 2.52 g/cm
Streak is white.
Associated Minerals include aegirine, albite, erdite, eudialyte
group minerals, lovozerite group minerals, makatite, microcline,
sodalite, terskite, ussingite and villiaumite.
Distinguishing Features: Brittle.
Origin: Named in 2004 for Dr Robert François Martin (b. 1941), professor
of mineralogy, McGill University, Montréal, Québec, editor of the
Canadian Mineralogist, in recognition of his work on the mineralogy
of feldspars and the petrology of alkaline intrusions.
CLASSIFICATION:
Dana System
# 73.2.2d.1
Strunz Classification
# VIII/FX.00-00
REFERENCES:
In press
DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:
MSH
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Martinite crystals
© Modris Baum
Martinite crystals
© Jason B. Smith