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

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

Nordstrandite crystals - click for larger pic
Tabular nordstrandite
2mm
Photo by John Veevaert
© Trinity Mineral Company

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Home > Mineral Descriptions > Nordsrandite - (5 Photos)



Nordsrandite
Al(OH)3

     Nordstrandite is relatively rare at Mont Saint-Hilaire. It is one of three polymorphs Al(OH)3 at MSH, the others being doyleite and gibbsite.

PHYSICAL CHARACTERISTICS:

Color is usually colorless, white, pink, beige and pale green.
Luster is vitreous to pearly.
Diaphaneity is transparent to translucent.
Crystal System is triclinic; P1.
Crystal Habits include aggregates of blocky, tabular crystals to
   2mm and botyroidal aggregates.
Cleavage {110} is perfect.
Fracture is uneven.
Hardness is 3.
Specific Gravity is approximately 2.4 g/cm3.
Streak is white.
Associated Minerals include aegirine, albite, analcime, ancylite,
   calcite, dawsonite, dolomite, doyleite, fluorapatite, fluorite, gonnardite,
   lizardite, microcline, pyrite, rutile, sodalite, siderite, zircon and
   UK #53 (to be described soon).
Distinguishing Features: Crystal habit.
Origin: Named in 1958 after Robert A. van Nordstrand (b. 1917),
   Sinclair Research Laboratories, U.S.A..

CLASSIFICATION:

Dana System
# 6.3.3.1

Strunz Classification
# IV/F.02-30

REFERENCES:
MinRec 21:327 (1990), Dana 8:281-282 (1997)

DISTRIBUTION AND RARITY AT MONT SAINT-HILAIRE:

MSH
¤¤¤

PE
--

AP
¤¤

MX
--

SS
¤¤

MC
--

HF
--

BR
--

SX
--

FR
--

Legend

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

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