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Doyleite crystals - click for larger pic
Doyleite crystals
© Reproduced courtesy of
Canadian
Museum of Nature

Ottawa, Canada

Doyleite crystals - click for larger pic
Doyleite crystals
© Reproduced courtesy of
Canadian
Museum of Nature

Ottawa, Canada

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Home > Mineral Descriptions > Doyleite (TL) - (2 Photos)



Doyleite (Type Locality)
Al(OH)3

     Doyleite, formerly UK #45, was described from Mont Saint-Hilaire in 1985. It is extremely rare at the site.

PHYSICAL CHARACTERISTICS:

Color is usually colorless to white or beige.
Luster is vitreous to pearly to dull.
Diaphaneity is transparent to translucent to opaque.
Crystal System is triclinic; P1.
Crystal Habits include small square tabular crystals to 8mm with
   a layered micaceous structure forming rosettes.
Cleavage {010} is perfect and {100} is much less distinct.
Fracture is (??).
Hardness is 2.5 - 3.
Specific Gravity is approximately 2.48 g/cm3.
Streak is white.
Associated Minerals include albite, fluorite, molybdenite, pyrite,
   siderite and zircon.
Distinguishing Features: Crystal habit.
Origin: Named in 1985 for E.J. Doyle (b. 1905), Canadian physician
   and mineral collector, who first found the mineral.

CLASSIFICATION:

Dana System
# 6.3.4.1

Strunz Classification
# IV/F.2-40

REFERENCES:
CanMin 23:21-28 (1985), MinRec 21:306 (1990), Dana 8:282 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
--

MC
--

HF
--

BR
--

SX
--

FR
--

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