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
- Image
- Dawsonite-90694.jpg
Show 7 more facts
- 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
- IMA Mineral Symbol
- Dws
- chemical formula
- NaAl(CO₃)(OH)₂
- Strunz 8th edition (series ID, updated)
- Vb/B.02
Sources (1)
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- 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.