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Dawsonite

This page kindly sponsored by Donald Doell
John William Dawson
Formula:
NaAlCO3(OH)2
System:
Orthorhombic
Colour:
Colourless to white; ...
Hardness:
3
Name:
After Canadian John William Dawson (1820-1899), Principal of McGill University and geologist.
A low-temperature hydrothermal mineral.

Classification of Dawsonite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
5.BB.10

5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
B : With alkalies, etc.
16a.3.8.1

16a : ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
3 : (AB)2(XO3)Zq
11.7.3

11 : Carbonates
7 : Carbonates of Al
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First Recorded Occurrence of Dawsonite

Place of Conservation of First Recorded Material:
McGill University Montreal RMF2381A
Year of Discovery:
1874
Geological Setting of First Recorded Material:
Feldspathic dike cutting Trenton limestone.
Associated Minerals at First Recorded Locality:

Occurrences of Dawsonite

Geological Setting:
Nepheline syenites, authigenic in alkaline shales and coal bearing rocks, saline soils on nepheline tuffs.

Physical Properties of Dawsonite

Vitreous, Silky
Diaphaneity (Transparency):
Transparent
Colour:
Colourless to white; rarely pink; colourless in transmitted light
Streak:
White
Hardness (Mohs):
3
Cleavage:
Perfect
On {110}
Density:
2.436 g/cm3 (Measured)    2.431 g/cm3 (Calculated)

Crystallography of Dawsonite

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Imma
Cell Parameters:
a = 6.759Å, b = 10.425Å, c = 5.585Å
Ratio:
a:b:c = 0.648 : 1 : 0.536
Unit Cell Volume:
V 393.53 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Bladed to acicular crystals forming incrustations and rosettes; tufts of fine needles. Crystals elongated [001], to 3.5cm.
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Optical Data of Dawsonite

Type:
Biaxial (-)
RI values:
nα = 1.466 nβ = 1.542 nγ = 1.596
2V:
Measured: 77° , Calculated: 76°
Max Birefringence:
δ = 0.130
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak r < v

Chemical Properties of Dawsonite

Formula:
NaAlCO3(OH)2
Essential elements:
All elements listed in formula:

Relationship of Dawsonite to other Species

5.BB.05BarentsiteNa7Al(HCO3)2(CO3)2F4
5.BB.15TunisiteNaCa2Al4(CO3)4(OH)8Cl
5.BB.20SabinaiteNa4Zr2TiO4(CO3)4
11.7.1ScarbroiteAl5(CO3)(OH)13 · 5H2O
11.7.2HydroscarbroiteAl14(CO3)3(OH)36 · nH2O
11.7.4HydrotalciteMg6Al2(OH)16[CO3] · 4H2O
11.7.5Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2O
11.7.6IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
11.7.7AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2O
11.7.8Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
11.7.9TunisiteNaCa2Al4(CO3)4(OH)8Cl
11.7.10WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O
11.7.11MontroyaliteSr4Al8(CO3)3(OH,F)26 · 10-11H2O
11.7.12DresseriteBaAl2(CO3)2(OH)4 · H2O
11.7.13HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2O
11.7.14Strontiodresserite(Sr,Ca)Al2(CO3)2(OH)4 · H2O

Other Names for Dawsonite

Name in Other Languages:
Catalan:Dawsonita
Dutch:Dawsoniet
German:Dawsonit
Italian:Dawsonite
Simplified Chinese:丝钠铝石
Spanish:Dawsonita
Traditional Chinese:絲鈉鋁石

Other Information

Other Information:
Soluble in acids with effervescence.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Dawsonite

Reference List:
HARRINGTON, B.J. (1874): Notes on dawsonite, a new carbonate. The Canadian Naturalist and Quarterly Journal of Science VII, 305-309.
HARRINGTON, B.J. (1878): Note on the composition of dawsonite. The Canadian Naturalist, New series X 84-86.
GRAHAM, R.P.D. (1908): Dawsonite: a carbonate of soda and alumina. Transactions of the Royal Society of Canada, Section IV, 165-177.
FRUEH, A.J. & GOLIGHTLY, J.P. (1967): The crystal structure of dawsonite NaAl(CO3)(OH)2. Canadian Mineralogist 8, 51 56.
CORAZZA, E., SABELLI, C. & VANNUCCI, S. (1977): Dawsonite: new mineralogical data and structure refinement. Neues Jahrbuch Mineralogie, Monatshefte, 381-397.

Internet Links for Dawsonite

Specimens:
The following Dawsonite specimens are currently listed for sale on minfind.com.

Localities for Dawsonite

map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
Albania
 
  • Shkodër County (Shkodra County)
    • Drin valley
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 277.; V. Ferrini, L. Martarelli, C. De Vito, A. Cina and T. Deda (2003) The Koman dawsonite and realgar-orpiment deposit, northern Albania; inferences on processes of formation. The Canadian Mineralogist(April 2003), 41, Part 2:413-427
Algeria
 
  • Chlef Province
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 277.
Argentina
 
  • Chubut
    • Paso de Indios Department
      • Los Altares
Zalba, P.E., Conconi, M.S., Morosi, M., Manassero, M. & Comerio, M. (2011): Dawsonite in tuffs and litharenites of the Cerro Castaño Member, Cerro Barcino Formation, Chubut group (Cenomanian), Los Altares, Patagonia, Argentina. Canadian Mineralogist. 49. 503-520
Australia
 
AmMin 60:285-291 (1975)
    • Durham Co.
      • Muswellbrook
Keith F Compton collection
Austria
 
  • Styria
    • Fürstenfeld
      • Loipersdorf
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Judenburg
      • Fohnsdorf
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Belgium
 
  • Luxembourg Province
    • Stavelot Massif
      • Vielsalm
        • Grand Halleux
Hatert, F., Deliens, M., Fransolet, A.-M. & van der Meersche, E. (2002): Les minéraux de Belgique. 2ème édition, Muséum des Sciences Naturelles, Bruxelles, Ed., 304 p.
Bolivia
 
  • Cochabamba Department
    • Ayopaya Province
Alfredo Petrov collection; Laszlo Horvath collection
Canada
 
  • Newfoundland and Labrador
    • Newfoundland
Econ Geol (1985) 80:1297-1327
  • Ontario
    • Hastings Co.
      • Dungannon Township
Sabina (1986) Geol. Survey of Canada, Misc. Report 39, 11-14.
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.; J. S. Stevenson and L. S. Stevenson (1977) Dawsonite-fluorite relationships at Montreal-area localities. The Canadian Mineralogist 15:117-120
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
      • Longueuil TE
        • Saint-Bruno-de-Montarville
          • Mont Saint Bruno
Mandarino & Harris (1965) New Canadian mineral occurrences. Canadian Mineralogist, 8, 377-381. ; Can Mineral August 1978 v. 16 no. 3 p. 471-474
    • Montréal
JAMBOR, J.L., PLANT, A.G., and STEACY, H.R. (1976) A dawsonite-bearing silicocarbonatite sill from Montreal Island, Quebec. Geological Survey of Canada Paper, 76-1B, 357-362. TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. The Mineralogical Record, 37, 5-60.; J. S. Stevenson and L. S. Stevenson (1977) Dawsonite-fluorite relationships at Montreal-area localities. The Canadian Mineralogist 15:117-120
Canadian Museum of Nature collection
HARRINGTON, B.J. (1874 & 1978); Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 277.; Stevenson, John S., The Petrology of Dawsonite at the Type Locality, Montreal, The Canadian Mineralogist, 1964
Sabina (1983) GSC Misc. Rep. 32, 57
      • Mont Royal
Dolan (1923)
J. S. Stevenson and L. S. Stevenson (1977) Dawsonite-fluorite relationships at Montreal-area localities. The Canadian Mineralogist 15:117-120
  • Saskatchewan
D. M. Egan (1986) The Occurrence of Scarbroite at Muskiki Lake, Saskatchewan, Canada. Mineralogical Magazine 50:180
China
 
  • Inner Mongolia Autonomous Region
    • Hulunbuir League (Hulunbei'er Prefecture)
      • New Barag Left Banner (Xin Barag Zuoqi)
        • Bei'er lake depression
Yuqiao Gao and Li Liu (2007): Geological Review 72(1), 104-111
  • Jilin Province (Manchuria; Dongbei Region)
    • Songyuan Prefecture
      • Qian Gorlos Co. (Qianguo'erluosi Co.)
Yuqiao Gao, Li Liu, Xiyu Qu, and Na Liu (2008): Journal of Palaeogeography 10(2), 111-123
Czech Republic
 
  • Bohemia (Böhmen; Boehmen)
    • Central Bohemia Region
      • Kladno
Žáček, V., Frýda, J., Ondruš, P., Opluštil, S.: Polymetalická mineralizace v proterozoiku v podloží karbonské pánve na dole Slaný. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 1994, roč. 2, s. 123-126.
Hungary
 
  • Heves Co.
    • Mátra Mts
      • Recsk
Baksa, C.; Bognar, L.; Lovas, G. (1975): Occurrence of dawsonite at Recsk, Matra Mountains, northwest Hungary. Acta Geologica Academiae Scientiarum Hungaricae 19(3-4), 281-6.
Szakáll & Jánosi: Minerals of Hungary, 1995
Italy
 
Di Domenico D.,Vinci F. (2011) Dawsonite di Canale Monterano,Manziana,Roma.Micro,numero 2,volume 2011.
    • Rome Province
      • Bracciano Lake
        • Manziana
Di Domenico, D. & Vinci, F. (2011): Dawsonite di Canale Monterano, Manziana, Roma. Micro, 2/2011, 54-57
Di Domenico, D., Vinci, F. (2011): Dawsonite di Canale Monterano, Manziana, Roma. Micro 02/2011, 54-57.
      • Tolfa Mts District
luigi mattei
  • Trentino-Alto Adige
    • Bolzano Province (South Tyrol)
      • Adige Valley (Etsch Valley)
        • Terlano (Terlan)
Exel, R. (1987): Guida mineralogica del Trentino e del Sudtirolo. Athesia, Bolzano, 204 pp.
  • Tuscany
    • Grosseto Province
      • Amiata Mt.
AGMT (Associazione Geomineralogica Toscana) - 2008
AGMT (Associazione Geomineralogica Toscana) - 2008
      • Manciano
        • San Martino sul Fiora
Meli, R. (2000): L'antica miniera antimonifera di S. Martino sul Fiora, Mancianese (Grosseto). Rivista Mineralogica Italiana, 2/2000, 111-113.
    • Livorno Province
      • Livorno
        • Valle Benedetta
Malesani P. Vannucci S. - Su una nuova varieta di dawsonite ritrovata nella Valle Benedetta (Livorno). Periodico di Mineralogia - Vol. 43 - pp. 655-662.
      • Rosignano Marittimo
Chollet Pascal
    • Massa-Carrara Province
      • Apuan Alps
Orlandi P., Franzini M., 1994. I minerali del marmo di Carrara. Amilcare Pizzi S.p.A., Milano. ; Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp.
Orlandi P., Franzini M., 1994. I minerali del marmo di Carrara. Amilcare Pizzi S.p.A., Milano.
Orlandi P., Franzini M., 1994. I minerali del marmo di Carrara. Amilcare Pizzi S.p.A., Milano.
        • Massa
Orlandi, P. & Criscuolo, A. (2009). Minerali del marmo delle Alpi Apuane. Pacini editore, Pisa, 180 pp
    • Pisa Province
      • Lajatico
Orlandi P., (2005). "Geositi minerari e mineralogici della provincia di Pisa" in La geologia della provincia di Pisa. Cartografia, geositi e banche dati, pp. 55-280, Provincia di Pisa, 2005
No reference listed
      • Amiata Mt.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 277.
  • Veneto
    • Vicenza Province
      • Recoaro Terme
Boscardin M., Daleffe A., Rocchetti I., Zordan A. “I minerali nel Vicentino”, Museo “G. Zannato”, Montecchio Maggiore (Vicenza), 2011.
Japan
 
  • Honshu Island
    • Kanto Region
      • Gunma Prefecture
        • Fujioka
American Mineralogist (1986): 71, 1022-1027.
    • Kinki region
      • Mie Prefecture
        • Taki-cho
Alfredo Petrov specimens
Alfredo Petrov specimens
      • Osaka Prefecture
        • Sennan City
Alfredo Petrov specimen
Mauritania
 
  • Adrar Region
Guillaumen Matton (2008) Le Complexe Crétacé Du Rlchat (Mauritanie); Un Processus Alcalin Péri-Atlantiqu. PhD Thesis University of Montreal.
Mexico
 
  • Chihuahua
    • Mun. de Aquiles Serdán
      • Santa Eulalia District
        • East Camp
Megaw, P.K.M., 1990b, Geology and geochemistry of the Santa Eulalia mining district, Chihuahua, Mexico.: Unpublished Ph.D. Thesis, Univ. of Arizona, 549 p
New Zealand
 
  • North Island
Railton, G.L. & Watters, W.A., Minerals of New Zealand, New Zealand Geological Survey Bull. #104 (1990).
Russia
 
  • Northern Caucasus Region
    • Karachaevo-Cherkesskaya Republic (Karachai-Cherkess Republic; Karachay-Cherkessia Republic)
Zvezdinskaya L.V., Shtanov V.I. (1995) Composition of dawsonite and its thermal decomposition process, - DAN, 344(6), p.798-800 (in Rus.).
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
        • Khibiny Massif
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
            • Kirovskii apatite mine (Kirovsky Mine; Kirovskii Mine; Kirov Mine)
Pekov, I. et al (2003): New Data on Minerals: 38: 20-33.
P.M. Kartashov data
Slovakia
 
  • Banská Bystrica Region
    • Banská Bystrica Co.
Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická nalezište Slovenska. Kuttna,K.Hora, 136p
  • Prešov Region
    • Bardejov Co.
Bačo,P.,Pacindová,M., 1993: Whewellit a dawsonit - epigenetická mineralizácia v puklinách pieskovca pri Cígeľke. Min.Slovaca,Bratislava, 4,277-281p
    • Prešov Co.
      • Červenica
        • Dubník
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590
Duda et. all.,1981:Minerály severnej časti Slanských vrchov. Min.Slovca,Monografia 2,Bratislava, 98 p
    • Snina Co.
Pauliš,P.,Ďuďa,R.,2002: Nejzajímavejší mineralogická naletište Slovenska. Kuttna,K.Hora, 136p
    • Svidník Co.
Ďuďa,R., Bajo,I., 1983: Dawsonity v pieskovcoch zlínskych vrstiev při Beňadikovciach. Zbor.Východoslov. múzea, Prír.vedy XXIII, 35 – 40
    • Vranov nad Topľou Co.
Ďuďa,R., Kaličiaková,E., 1987: Mineralogicko – paragenetické pomery Hg ložiska Merník. Min.Slovaca, 19,5,423 – 442
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
Switzerland
 
  • Wallis (Valais)
    • Brig
      • Simplon pass area
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): Mineralienlexikon der Schweiz. Wepf (Basel), p. 132.
Tanzania
 
  • Arusha Region
    • Ngorongoro Conservation Area
Hay, Richard Le Roy (1964), Phillipsite of saline lakes and soils American Mineralogist: 49: 1366-87
USA
 
  • California
    • Inyo Co.
      • Saratoga District (Tecopa Mountain District; Shoshone District ?)
        • Sperry Hills
          • Tecopa
Bailey, Gilbert E. (1902), The saline deposits of California: California Mining Bureau Bulletin 24: 102; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 167.
    • Sierra Co.
      • Forest District (Alleghany; Chips Flats; Minnesota)
        • Alleghany
Ferguson, Henry G. & R.W. Gannett (1932), Gold quartz veins of the Alleghany district, California: USGS PP 172: 45; Coveney, R.M. & W.C. Kelly (1971), Dawsonite as a daughter mineral in hydrothermal fluid inclusions: Contributions to Mineralogy and Petrology: 32: 334-342, 335; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 198.; Raymond M. Coveney Gold quartz veins and auriferous granite at the Oriental Mine, Alleghany District, California Economic Geology and the Bulletin of the Society of Economic Geologists (December 1981), 76(8):2176-2199; J. S. Stevenson and L. S. Stevenson (1977) Dawsonite-fluorite relationships at Montreal-area localities. The Canadian Mineralogist 15:117-120
    • Stanislaus Co.
      • Diablo Range
        • Orestimba District
          • Rooster Comb
[var: Chromian Dawsonite] Dunning, G. E. (2000): Chromian dawsonite and chromian alumohydrocalcite from Orestimba Creek, Stanislaus County, California. Mineralogical Record 31, 333-338.
  • Colorado
    • Boulder Co.
Minerals of Colorado (1997) Eckels, E. B.
    • Clear Creek Co.
      • Freeland
Minerals of Colorado (1997) Eckels, E. B.
      • Georgetown District
Minerals of Colorado (1997) Eckels, E. B.
    • Garfield Co.
      • Piceance Basin
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) Eckel, E. B.
    • Jefferson Co.
      • South Platte Pegmatite District
Minerals of Colorado (1997) Eckels, E. B.
    • Rio Blanco Co.
Minerals of Colorado (1997) E.B. Eckels
      • Piceance Basin
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) Eckels, E. B.
      • Piceance Creek Basin
U.S. Geological Survey, 2005, Mineral Resources Data System: U.S. Geological Survey, Reston, Virginia.
    • San Miguel Co.
      • Ouray District (Uncompahgre District)
        • Telluride
Minerals of Colorado (1997) Eckels, E. B.
  • South Dakota
    • Custer Co.
      • Custer District
        • Fourmile
American Mineralogist (2003): 88: 1055.
  • Utah
    • Duchesne Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Uintah Co.
UGMS Bull 117 Minerals and Mineral Localities of Utah
Mineral and/or Locality  
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