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Mg2(UO2)(CO3)3 · 18H2O
Yellow, whitish yellow
Named after William S. Bayley (1861-1943), American mineralogist and geologist.
This page provides mineralogical data about Bayleyite.

Classification of Bayleyite

Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"

E : Uranyl Carbonates
D : UO2:CO3 = 1:3

3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1

11 : Carbonates
11 : Carbonates of Cr and U URL:
Please feel free to link to this page.

Type Occurrence of Bayleyite

Year of Discovery:
Geological Setting of Type Material:
Post-mining efforescent coatings on mine walls.
Associated Minerals at Type Locality:

Physical Properties of Bayleyite

Diaphaneity (Transparency):
Yellow, whitish yellow
2.05 g/cm3 (Measured)    2.06 g/cm3 (Calculated)

Crystallography of Bayleyite

Crystal System:
Cell Parameters:
a = 26.65Å, b = 15.31Å, c = 6.53Å
β = 93.07°
a:b:c = 1.741 : 1 : 0.427
Unit Cell Volume:
V 2,660.49 ų (Calculated from Unit Cell)
Crystals minute, short-prismatic; also acicular; in divergent groups (artificial material).

Optical Data of Bayleyite

Biaxial (-)
RI values:
nα = 1.453 - 1.455 nβ = 1.490 - 1.492 nγ = 1.498 - 1.502
Measured: 30°
Max Birefringence:
δ = 0.045 - 0.047
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r > v distinct
X = Pinkish
Y = Light yellow
Z = Light yellow

Chemical Properties of Bayleyite

Mg2(UO2)(CO3)3 · 18H2O
All elements listed in formula:

Relationship of Bayleyite to other Species

5.ED.10SwartziteMgCa(UO2)(CO3)3 · 12H2O
5.ED.15AlbrechtschraufiteCa4Mg(UO2)2(CO3)6F2 · 17-18H2O
5.ED.20LiebigiteCa2(UO2)(CO3)3 · 11H2O
5.ED.25RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
5.ED.30AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
5.ED.35GrimseliteK3Na(UO2)(CO3)3 · H2O
5.ED.45ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O
11.11.1StichtiteMg6Cr2(OH)16[CO3] · 4H2O
11.11.3Joliotite(UO2)CO3 · nH2O
11.11.4GrimseliteK3Na(UO2)(CO3)3 · H2O
11.11.6MetazelleriteCa(UO2)(CO3)2 · 3H2O
11.11.7ZelleriteCa(UO2)(CO3)2 · 5H2O
11.11.8WyartiteCaU5+(UO2)2(CO3)O4(OH) · 7H2O
11.11.9UrancalcariteCa(UO2)3(CO3)(OH)6 · 3H2O
11.11.10SharpiteCa(UO2)6(CO3)5(OH)4 · 6H2O
11.11.11VogliteCa2Cu(UO2)(CO3)4 · 6H2O
11.11.12AndersoniteNa2Ca(UO2)(CO3)3 · 6H2O
11.11.13SwartziteMgCa(UO2)(CO3)3 · 12H2O
11.11.14RabbittiteCa3Mg3(UO2)2(CO3)6(OH)4 · 18H2O
11.11.15Kamotoite-(Y)Y2(UO2)4(CO3)3O4 · 14H2O
11.11.16Shabaite-(Nd)Ca(Nd,Sm,Y)2(UO2)(CO3)4(OH)2 · 6H2O
11.11.17Astrocyanite-(Ce)Cu2(Ce,Nd,La)2(UO2)(CO3)5(OH)2 · 1.5H2O
11.11.18Bijvoetite-(Y)(Y,Dy)2(UO2)4(CO3)4(OH)6 · 11H2O
11.11.20ZnucaliteZn12Ca(UO2)(CO3)3(OH)22 · 4H2O

Other Names for Bayleyite

Name in Other Languages:

Other Information

Weakly fluorescent in UV.
Other Information:
Soluble in water.
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 Bayleyite

Reference List:
Axelrod, Grimaldi, Milton, and Murata (1951) American Mineralogist: 36: 1-22.

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: Halides, Nitrates, Borates, Carbonates, Sulfates, Phosphates, Arsenates, Tungstates, Molybdates, Etc. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 237-238.

Mayer, H. and Mereiter, K. (1986) Synthetic bayleyite, Mg2[UO2(CO3)3]·18H2O: thermochemistry, crystallography and crystal structure. Tschermaks Mineralogische und Petrographische Mitteilungen: 35: 133-146.

Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.

Internet Links for Bayleyite

Localities for Bayleyite

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.
  • Mendoza
    • Malargüe Department
      • Pampa Amarilla District
Linares, E. El Yacimiento Cerro Huemul, Malargue, Mendoza. Informe Comision Nacional de Energia Atomica. Inedito. 1956; American Mineralogist: 51: 1-13
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Krušné Hory Mts (Erzgebirge)
Pavel Škácha
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
        • Rožná deposit
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 2. část. (Kutna Hora, issue 2
  • Languedoc-Roussillon
    • Hérault
      • Lodève
Le Règne Minéral, Hors Série IV (1998)
Le Règne Minéral, Hors Série IV (1998)
  • Thuringia
    • Gera
      • Ronneburg U deposit
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
T. Witzke & F. Rüger: Lapis 1998(7/8), 26-64
  • Guelmim-Es Semara Region
    • Tata Province
      • Azgour (Azegour)
J. Geffroy, J.A. Sarcia & J. Chervet (1960): "Les minéraux uranifères français et leurs gisements" p231
  • Catalonia
    • Lleida (Lérida)
      • El Pallars Jussà
        • La Vall Fosca
          • La Torre de Cabdella (La Torre de Capdella)
            • Castell-estaó
  • Bern
    • Hasli Valley
      • Grimsel area
        • Gerstenegg
Rolf Luetcke
Stalder, H. A., Wagner, A., Graeser, S. and Stuker, P. (1998): "Mineralienlexikon der Schweiz", Verlag Wepf & Co. (Basel), p. 69
  • Arizona
    • Cochise Co.
      • Mule Mts
        • Warren District
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.:69
Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 130.
    • Yavapai Co.
      • Eureka District
        • Bagdad
          • Bozarth Mesa
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: 236, 238; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 111, 130, 365; Anderson, C.A., et al (1955), Geology and ore deposits of the Bagdad area, Yavapai County, Arizona, USGS PP 278: 50; Axelrod, J.M., et al (1951), The uranium minerals from the Hillside mine, Yavapai Co., AZ, Am.Min.: 36: 1-22; Frondel, C.C. (1958), Systematic mineralogy of uranium and thorium, USGS Bull. 1064: 119; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 51, 52.
  • Colorado
    • Clear Creek Co.
      • Idaho Springs District
Minerals of Colorado (1997) E.B. Eckels
Minerals of Colorado (1997) E.B. Eckels
      • Lawson District (Dumont District)
Minerals of Colorado (1997) Eckels, E. B.; U.S. Geological Survey Professional Paper 371
    • Garfield Co.
      • East Rifle Creek area
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) E.B. Eckels
    • Jefferson Co.
      • Ralston Buttes District
Minerals of Colorado (1997) Eckels, E. B.
    • Montrose Co.
      • Uravan District
        • Paradox Valley
Minerals of Colorado (1997) Eckels, E. B.
Minerals of Colorado (1997) Eckels, E. B.
  • New Mexico
    • Cibola Co.
      • Grants District
Minerals of New Mexico 3rd ed.
    • McKinley Co.
Northrop, Minerals of New Mexico, 3rd Rev. Ed., 1996
Northrup, Minerals of New Mexico, 3rd Rev. Ed., 1996
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
NMBMMR Memoir 15 Geology and Technology of the Grants Uranium Region
        • Poison Canyon area
New Mexico Bureau of Mines and Mineral Resources
    • Sandoval Co.
      • Nacimiento Mountains District
NMBMMR Memoir 38 Geology and Technology of the Grants Uranium Region 1979; USGS Open-File Report 79-1510
  • Oklahoma
    • Comanche Co.
Rocks & Min. vol. 72 (1997)
  • Utah
    • Emery Co.
      • San Rafael District (San Rafael Swell)
        • Delta
UGMS Bull 117 Minerals and Mineral Localities of Utah
    • Grand Co.
    • San Juan Co.
      • Big Indian District (Big Indian Wash - Lisbon Valley Area)
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • Elk Ridge
UGMS Bull 117 Minerals and Mineral Localities of Utah
      • White Canyon District
        • White Canyon
          • Fry Mesa
Jakub Plášil, Karla Fejfarová, Radek Škoda, Michal Dušek, Joe Marty and Jiří Čejka (2013): The crystal structure of magnesiozippeite, Mg[(UO2)2O2(SO4)](H2O)3.5, from East Saddle Mine, San Juan County, Utah (U.S.A.). Mineral. Petrol. 107, 211-219.
        • Woodenshoe Buttes
          • The Toe
            • Deer Flat
Minerals and Mineral Localities of Utah. Utah Department fo Natural Resources Bulletin 117. Jan. 1981; Page, L. R.; Stocking, H. E.; Smith, H. B. (1956) Contributions to the geology of uranium and thorium by the United States Geological Survey and Atomic Energy Commission for the United Nations International Conference on Peaceful Uses of Atomic Energy, Geneva, Switzerland, 1955. USGS Professional Paper 300 pp281-284
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