Dawsonite

Dawsonite
General
Category	Carbonate minerals
Chemical formula	NaAlCO3(OH)2
Strunz classification	05.BB.10
Dana classification	16a.03.08.01
Crystal symmetry	2/m 2/m 2/m
Identification
Molar mass	144.00
Color	white
Crystal habit	encrustations or radial
Crystal system	orthorhombic
Cleavage	perfect on {110}
Fracture	uneven
Mohs scale hardness	3
Luster	vitreous
Streak	white
Diaphaneity	transparent
Specific gravity	2.436
Refractive index	nα = 1.466 nβ = 1.542 nγ = 1.596
Birefringence	δ = 0.130
2V angle	77º
References	[1][2]

Dawsonite is a mineral composed of sodium aluminium carbonate hydroxide, chemical formula NaAlCO₃(OH)₂. It crystallizes in the orthorhombic crystal system. It is not mined for ore. It was discovered in 1874 during the construction of the Redpath Museum in a feldspathic dike on the campus of McGill University on the Island of Montreal, Canada.^[1] It is named after geologist Sir John William Dawson.^[2]

The type material is preserved in the collection of the Redpath Museum.^[1]

See also

• List of minerals
• List of minerals named after people
• Dihydroxialumini sodium carbonate, the commercial (artificial) form, used as an antacid

References

1. ^ ^{a b c} Dawsonite, MinDat.org, http://www.mindat.org/show.php?id=1240, retrieved 2009-12-06 .
2. ^ ^{a b} Dawsonite, WebMineral.com, http://webmineral.com/data/Dawsonite.shtml, retrieved 2009-12-06 .

This article about a specific carbonate mineral is a stub. You can help Wikipedia by expanding it.v · Categories: Sodium minerals Aluminium minerals Carbonate minerals Carbonate mineral stubs Wikimedia Foundation. 2010. Игры ⚽ Нужно сделать НИР? Great Bear Jean-Yves Roy Look at other dictionaries: Dawsonite — Daw son*ite, n. [Named after J. W. Dawson of Montreal.] (Min.) A hydrous carbonate of alumina and soda, occuring in white, bladed crustals. [1913 Webster] …   The Collaborative International Dictionary of English dawsonite — /daw seuh nuyt /, n. an orthorhombic mineral, hydrous sodium aluminum carbonate, NaAlCO3(OH)2, with a vitreous luster, occurring as white blade shaped crystals: mined as an ore of aluminum. [named after J.W. DAWSON; see ITE1] * * * ▪ mineral… …   Universalium dawsonite — noun An orthorhombic mineral composed of sodium aluminium carbonate hydroxide …   Wiktionary dawsonite — daw·son·ite …   English syllables dawsonite — ˈdȯsənˌīt noun ( s) Etymology: Sir John W. Dawson died 1899 Canadian geologist + English ite : a mineral NaAl(CO3)(OH)2 consisting of a basic aluminum sodium carbonate occurring in white bladed crystals (sp. gr. 2.40) …   Useful english dictionary Strontiodresserite — Strontiodressérite La strontiodressérite est un carbonate complexe de strontium et d’aluminium monohydraté. Son nom dérive de la dresserite, qui honore le géologue canadien J.A. Dresser (1866 1954), auquel on a ajouté le préfixe strontio… …   Wikipédia en Français Strontiodressérite — Strontiodressérite[1] Catégorie V : carbonates et nitrates[2] …   Wikipédia en Français Superior multimineral process — McDowell–Wellman process Process type Chemical Industrial sector(s) Chemical industry oil industry Feedstock oil shale Product(s) shale oil Leadi …   Wikipedia List of minerals C-E (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia List of minerals — This is a List of minerals for which there are Wikipedia articles. Mineral variety names and mineraloids are to be listed after the valid minerals for each letter.For a complete listing (about 4,000) of all mineral names: List of minerals… …   Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”