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Guilleminite

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Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
© Stephan Wolfsried

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Formula:
Ba(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
·3H
 
2
O
System:Orthorhombic
This page provides mineralogical data about Guilleminite.

Classification of Guilleminite

IMA status:Approved
Strunz 8th edition ID:4/K.11-30
Nickel-Strunz 10th (pending) edition ID:4.JJ.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
J : Selenites with additional anions, with H2O
Dana 8th edition ID:34.7.3.1

34 : SELENITES, TELLURITES AND SULFITES
7 : Hydrated Selenites, Tellurites and Sulfites containing Hydroxyl or Halogen
Hey's CIM Ref.:28.1.9

28 : Selenites, Selenates, Tellurites, and Tellurates
1 : Selenites
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Type Occurrence of Guilleminite

Type Locality:Musonoi Mine, Kolwezi, Western area, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)
Year of Discovery:1965

Crystallography of Guilleminite

Crystal System:Orthorhombic
Cell Parameters:a = 7.29Å, b = 16.87Å, c = 7.07Å
Ratio:a:b:c = 0.432 : 1 : 0.419
Unit Cell Volume:V 869.48 ų (Calculated from Unit Cell)

Optical Data of Guilleminite

Type:Biaxial (-)
RI values: nα = 1.720 nβ = 1.798 nγ = 1.805
2V:Measured: 35° , Calculated: 32°
Maximum Birefringence:δ = 0.085

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

Chemical Properties of Guilleminite

Formula:
Ba(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
·3H
 
2
O
Essential elements:Ba, H, O, Se, U
All elements listed in formula:Ba, H, O, Se, U

Relationship of Guilleminite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
4.JJ.05Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
3
(OH)
 
2
·7H
 
2
O
4.JJ.15Piretite
Ca(UO
 
2
)
 
3
(SeO
 
3
)
 
2
(OH)
 
4
 ·4H
 
2
O
4.JJ.20Demesmaekerite
Pb
 
2
Cu
 
5
(UO
 
2
)
 
2
(SeO
 
3
)
 
6
(OH)
 
6
·2H
 
2
O
4.JJ.25Haynesite
(UO
 
2
)
 
3
(OH)
 
2
(SeO
 
3
)
 
2
·5H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
28.1.1Chalcomenite
Cu[SeO
 
3
] · 2H
 
2
O
28.1.2Clinochalcomenite
Cu[SeO
 
3
] · 2H
 
2
O
28.1.3Francisite
Cu
 
3
Bi(SeO
 
3
)
 
2
O
 
2
Cl
28.1.4Sophiite
Zn
 
2
[Cl
 
2
|SeO
 
3
]
28.1.5Molybdomenite
PbSeO
 
3
28.1.6Haynesite
(UO
 
2
)
 
3
(OH)
 
2
(SeO
 
3
)
 
2
·5H
 
2
O
28.1.7Derriksite
Cu
 
4
UO
 
2
(SeO
 
3
)
 
2
(OH)
 
6
·H
 
2
O
28.1.8Marthozite
Cu(UO
 
2
)
 
3
(SeO
 
3
)
 
3
(OH)
 
2
·7H
 
2
O
28.1.10Demesmaekerite
Pb
 
2
Cu
 
5
(UO
 
2
)
 
2
(SeO
 
3
)
 
6
(OH)
 
6
·2H
 
2
O
28.1.11Mandarinoite
Fe
 
2
Se
 
3
O
 
9
·4H
 
2
O
28.1.12Cobaltomenite
Co[SeO
 
3
] · 2H
 
2
O
28.1.13Ahlfeldite
(Ni,Co)[SeO
 
3
] · 2H
 
2
O

Other Names for Guilleminite

Synonyms:
IMA1964-031
Other Languages:
German:Guilleminit
Russian:Гийменит
Spanish:Guilleminita

Other Information

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 Guilleminite

Reference List:American Mineralogist: 50: 2103.

Cooper, M.A. and Hawthorne, F.C. (1995) The crystal structure of guilleminite, a hydrated Ba-U-Se sheet structure. Canadian Mineralogist: 33: 1103-1109.

Cooper, M.A. and Hawthorne, F.C. (2001) Structure topology and hydrogen bonding in marthozite, Cu 2+[(UO2)3(SeO3)2O2](H2O)8, a comparison with guilleminite, Ba[(UO2)3(SeO3)2O2](H2O)3. Canadian Mineralogist: 39: 797-807.

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 Guilleminite

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    Localities for Guilleminite

    Hide Locality List
    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.
    (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.
    Democratic Republic of Congo (Zaïre)
     
    • Katanga (Shaba)
      • Katanga Copper Crescent
        • Central area
          • Shinkolobwe
        • Western area
          • Kolwezi
    		Bull.Soc.fr.Min.Crist.(1965) 88, 132-135
    France
     
    • Auvergne
      • Puy-de-Dôme
        • Saint-Amant-Tallende
          • Olloix
    		Le Règne Minéral, Hors Série IV (1998)
    Mineral and/or Locality
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