dawsonite
Sign in to saveDawsonite 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. It is named after geologist Sir John William Dawson (1820–1899).
Key facts
- Mineral.name
- Dawsonite
- Mineral.category
- Carbonate minerals
- Mineral.image
- Dawsonite-165134.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- Dawsonite from Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada
- Mineral.formula
- NaAlCO3(OH)2
- Mineral.IMAsymbol
- Dws
- Mineral.molweight
- 144.00 g/mol
- Mineral.strunz
- 5.BB.10
- Mineral.dana
- 16a.03.08.01
- Mineral.system
- Orthorhombic
- Mineral.class
- Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m)
- Mineral.symmetry
- Imam
- Mineral.color
- white
- Mineral.habit
- encrustations or radial
- Mineral.cleavage
- perfect on {110}
- Mineral.fracture
- uneven
- Mineral.mohs
- 3
via Wikipedia infobox
Wikidata facts
- Subclass of
- carbonate and nitrate class of minerals
- Named after
- John William Dawson
- Image
- Dawsonite-90694.jpg
Show 10 more facts
- type locality (geology)
- Mount Royal
- Nickel-Strunz '10th ed', review of (9th ed/ 2009 update)
- 5.BB.10
- Commons category
- Dawsonite
- Nickel-Strunz 9th edition (updated 2009)
- 5.BB.10
- Mohs' hardness
- 3
- streak color
- white
- crystal system
- orthorhombic crystal system
- IMA Mineral Symbol
- Dws
- chemical formula
- NaAl(CO₃)(OH)₂
- Strunz 8th edition (series ID, updated)
- Vb/B.02
Sources (1)
via Wikidata · CC0
~2 min read
Encyclopedic overview
2 sectionsContents
- See also
- References
{{Infobox mineral | name = Dawsonite | category = Carbonate minerals | image = Dawsonite-165134.jpg | imagesize = 260px | caption = Dawsonite from Mont Saint-Hilaire, Rouville RCM, Montérégie, Québec, Canada | formula = NaAlCO3(OH)2 | IMAsymbol = Dws | molweight = 144.00 g/mol | strunz = 5.BB.10 | dana = 16a.03.08.01 | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Imam | color = white | habit = encrustations or radial | twinning = | cleavage = perfect on {110} | fracture = uneven | mohs = 3 | luster = vitreous | refractive = nα = 1.466nβ = 1.542nγ = 1.596 | opticalprop = | birefringence = δ = 0.130 | 2V = 77° | pleochroism = | streak = white | gravity = 2.436 | density = | melt = | fusibility = | diagnostic = | solubility = | diaphaneity = transparent | other = | references = }} 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. It is named after geologist Sir John William Dawson (1820–1899).
The type material is preserved in the collection of the Redpath Museum.
Excerpted from Wikipedia’s “dawsonite” article, available under the CC BY-SA 4.0 licence.