Crandallite

Crandallite is a relatively uncommon mineral that typically occurs as earthy to compact masses, botryoidal crusts, or fine-grained aggregates.

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Information about Crandallite

Crandallite is a relatively uncommon mineral that typically occurs as earthy to compact masses, botryoidal crusts, or fine-grained aggregates.

It is often found in colours such as pale yellow, cream, white, grey, brown, and occasionally light greenish. It usually lacks distinct crystals, appearing dull or powdery.

 


Uses and History

Crandallite has no significant industrial uses due to its rarity and low economic importance.

Crandallite was named after Dr. Milan L. Crandall, Jr., an American geologist.

Its type locality is Brooklyn Mine, Utah, USA.


Mineralogy

Chemistry
Calcium aluminium phosphate with the formula CaAl3(PO4)(PO3OH)(OH)6
Colours and Variations

White, pale yellow, grey, cream, light brown, greenish

Streak
White
Luster
Vitreous
Transparency
Translucent
Fracture
Translucent
Crystal habit
Prismatic crystals, rhombohedra, fibrous, spherules, nodular, massive, crust.
Mohs hardness
5.0
Fluorescence
Specific Gravity
2.78-3.04
Easiest testing method

Hazards and Warnings

Mineral collectors should wash their hands after handling specimens, to avoid any exposure to potential toxins.

Almost all rocks, minerals (and, frankly, almost all other substances on earth) can produce toxic dust when cutting, which can cause serious respiratory conditions including silicosis.

When cutting or polishing rocks, minerals, shells, etc, all work should be done wet to minimise the dust, and a suitable respirator or extraction system should be used.

 


Translations

Arabic:

Hindi:

Portuguese:

  • Crandalita

Bengali:

Indonesian:

Punjabi:

English:

Italian:

Russian:

  • Крандаллит

French:

Japanese:

Spanish:

  • Crandallit

German:

  • Crandallit

Korean:

Thai:

Gujurati:

Mandarin Chinese:

  • 纖磷鈣鋁石

Urdu:


Further Reading / External Links