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Daubréeite

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Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia
© Thomas Witzke

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Formula:
(BiO)(OH,Cl)
System:TetragonalColour:Creamy-white, greyish, ...
Lustre:Greasy, SilkyHardness:2 - 2½
Member of:Matlockite Group
Name:
For French mineralogist and geologist Gabriel Auguste Daubrée (1814-96).


Matlockite Group.

Classification of Daubréeite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:3/D.0-50
Nickel-Strunz 10th (pending) edition ID:3.DC.25

3 : HALIDES
D : Oxyhalides, hydroxyhalides and related double halides
C : With Pb (As,Sb,Bi), without Cu
Dana 8th edition ID:10.2.1.3

10 : OXYHALIDES AND HYDROXYHALIDES
2 : A(O,OH)Xq
Hey's CIM Ref.:8.9.6

8 : Halides - Fluorides, Chlorides, Bromides and Iodides; also Fluoborates and Fluosilicates
9 : Halides of Sb and Bi
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Type Occurrence of Daubréeite

Type Locality:Constancia mine, Cerro Tazna, Atocha-Quechisla District, Nor Chichas Province, Potosí Department, Bolivia
Year of Discovery:1876
Geological Setting of type material:Oxidation zone of bismuth deposit.
Associated Minerals at type locality:
Clay

Physical Properties of Daubréeite

Lustre:Greasy, Silky
Diaphaneity (Transparency):Transparent
Colour:Creamy-white, greyish, yellowish-brown; colourless in transmitted light.
Hardness (Mohs):2 - 2½
Tenacity:Waxy
Cleavage:Perfect
On {001}
Comment:Very plastic
Density (measured):6.4 - 6.5 g/cm3
Density (calculated):7.70 g/cm3

Crystallography of Daubréeite

Crystal System:Tetragonal
Class (H-M):4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:P4/nmm {P4/n 21/m 2/m}
Cell Parameters:a = 3.85Å, c = 7.4Å
Ratio:a:c = 1 : 1.922
Unit Cell Volume:V 109.69 ų (Calculated from Unit Cell)
Z:2
Morphology:Massive only; compact, earthy, columnar to platy-fibrous.

Optical Data of Daubréeite

Type:Uniaxial (-)
RI values: nω = 2.150 nε = 1.910
Maximum Birefringence:δ = 0.240

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Very High

Chemical Properties of Daubréeite

Formula:
(BiO)(OH,Cl)
Essential elements:Bi, H, O
All elements listed in formula:Bi, Cl, H, O

Relationship of Daubréeite to other Species

Member of:Matlockite Group
Other Members of Group:

- +
Related Minerals - Nickel-Strunz Grouping):

- +
3.DC.05Laurionite
PbCl(OH)
3.DC.05Paralaurionite
PbCl(OH)
3.DC.10Fiedlerite
Pb
 
3
FCl
 
4
(OH) · H
 
2
O
3.DC.15Penfieldite
Pb
 
2
Cl
 
3
(OH)
3.DC.20Laurelite
Pb
 
7
F
 
12
Cl
 
2
3.DC.25Bismoclite
(BiO)Cl
3.DC.25Matlockite
PbFCl
3.DC.25Rorisite
CaFCl
3.DC.25Zavaritskite
(BiO)F
3.DC.25Zhangpeishanite
BaFCl
3.DC.30Nadorite
PbSbClO
 
2
3.DC.30Perite
PbBiClO
 
2
3.DC.35Aravaipaite
Pb
 
3
F
 
3
[AlF
 
6
] · H
 
2
O
3.DC.37Calcioaravaipaite
PbCa
 
2
AlF
 
9
3.DC.40Thorikosite
Pb
 
3
Cl
 
2
(OH)(SbO
 
3
,AsO
 
3
)
3.DC.45Mereheadite
Pb
 
47
Cl
 
25
(OH)
 
13
O
 
24
(CO
 
3
)(BO
 
3
)
 
2
3.DC.50Blixite
Pb
 
2
(O,OH)
 
2
Cl
3.DC.55Pinalite
Pb
 
3
WO
 
5
Cl
 
2
3.DC.60Symesite
Pb
 
10
(SO
 
4
)O
 
7
Cl
 
4
 · H
 
2
O
3.DC.65Ecdemite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
3.DC.65Heliophyllite
Pb
 
6
Cl
 
4
(As
 
2
O
 
7
)
3.DC.70Mendipite
Pb
 
3
Cl
 
2
O
 
2
3.DC.75Damaraite
Pb
 
3
Cl(OH)O
 
2
3.DC.80Onoratoite
Sb
 
8
Cl
 
2
O
 
11
3.DC.85Cotunnite
PbCl
 
2
3.DC.90Pseudocotunnite
K
 
2
PbCl
 
4
3.DC.95Barstowite
Pb
 
4
Cl
 
6
(CO
 
3
) · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
8.9.1Onoratoite
Sb
 
8
Cl
 
2
O
 
11
8.9.2Kelyanite
(Hg
+
2
)
 
6
Sb
3+
 
BrCl
 
2
O
 
6
8.9.3Gananite
BiF
 
3
8.9.4Zavaritskite
(BiO)F
8.9.5Bismoclite
(BiO)Cl
8.9.7Perite
PbBiClO
 
2

Other Names for Daubréeite

Synonyms:
Daubreite
Other Languages:
German:Daubréeit
Daubreit
Russian:Добрееит
Spanish:Daubréeita
Daubreita

Other Information

Other Information:Totally soluble in acids. Re-precipitates upon substantial dilution.
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Daubréeite

Reference List:

- +
Domeyko (1876) Comptes rendu de l’Académie des sciences de Paris: 82: 922.

Domeyko, I. (1879) Elementos de Mineralogia, 3rd. edition: 297.

Palache, Charles, Harry Berman & Clifford Frondel (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana Yale University 1837-1892, Seventh edition, Volume II: 60-62.

Internet Links for Daubréeite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Daubréeite details from Handbook of Mineralogy (PDF)
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    • Localities for Daubréeite

    The 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.
    Hide Locality List
    (TL) indicates type locality. ? 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.
    Bolivia
     
    • Potosí Department
      • Nor Chichas Province
        • Atocha-Quechisla District
    		[MinRec 32:481]
    Domeyko (1876); 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: 62.
      • Sud Chichas Province
        • Atocha-Quechisla District
          • Cerro Chorolque
    		[MinRec 32:468]
    Italy
     
    • Tuscany
      • Livorno Province
        • Elba Island
          • Rio Marina
            • Rio Mine (Rio Marina Mine)
    		G. Marinelli, 1959 - I minerali di bismuto del cantiere Falcacci a Rio Marina (Isola d'Elba). - Atti Soc. Tosc. Sc. Nat., Mem. Serie A, 66: 337-352.
    USA
     
    • Nevada
      • Nye Co.
    		NBMG Spec. Pub. 31 Minerals of Nevada
        • Round Mountain District
    		[MinRec 22:181]; Canadian Mineralogist Vol. 27, pp. 355-376(1988)
    • Oregon
      • Josephine Co.
        • Josephine Creek District
    		Dr. Frank Keutsch specimen (microinclusion in awaruite nugget)
    • Utah
      • Juab Co.
        • East Tintic Mts
          • Tintic District
    		UGMS Bull 117 Minerals and Mineral Localities of Utah
    Means, A H "Some New Mineral Occurences From The Tintic District, Utah" American Journal of Science Vol 41, Noi 241 (1916) pp 125-30; Means, A H "Some New Mineral Occurences From The Tintic District, Utah" American Journal of Science Vol 41, Noi 241 (1916) pp 125-30
    UGMS Bull 117 Minerals and Mineral Localities of Utah
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