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Guilleminite

A valid IMA mineral species
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06256040017112941456639.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
05492250014977150957613.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
03891650014976483098014.jpg
Guilleminite

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
08441620017056966035053.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
01405740014949707829865.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
07963500015205978146060.jpg
Guilleminite

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
06256040017112941456639.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
02591810014950055322102.jpg
Guilleminite, etc.

Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
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About GuilleminiteHide

05951550015292596271585.jpg
Claude Guillemin in the field in Congo
Formula:
Ba(UO2)3(SeO3)2O2 · 3H2O
Colour:
Bright yellow
Lustre:
Waxy, Greasy, Dull, Earthy
Hardness:
2
Specific Gravity:
4.88
Crystal System:
Orthorhombic
Name:
Named by R. Pierrot, J. Toussaint, and T. Verbeek in 1965 in honor of Jean Claude Guillemin [September 13, 1923 France - April 6, 1994 France], chemist and mineralogist, 1957-1969 he was professor at the Ecole des Mines in Paris and curator of the mineral collection of the Ecole des Mines. Guillemin was director general of the Union Miniere du Haut-Katanga and co-founder of the International Mineralogical Association.
The Ba analogue of borzęckiite. Compare 'UM1966-05-SeO:BaHPbU'.


Unique IdentifiersHide

Mindat ID:
1771
Long-form identifier:
mindat:1:1:1771:4
GUID
(UUID V4):
723358e5-c1e7-4eb1-94cd-de5f69b34860

IMA Classification of GuilleminiteHide

Classification of GuilleminiteHide

Strunz-mindat (2024):
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 ed.:
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

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference
GulIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of GuilleminiteHide

Lustre:
Waxy, Greasy, Dull, Earthy
Transparency:
Translucent
Colour:
Bright yellow
Streak:
Light yellow
Hardness:
2 on Mohs scale
Hardness Data:
Estimated
Tenacity:
Brittle
Cleavage:
Perfect
{100} perfect, {010} good.
Density:
4.88(2) g/cm3 (Measured)    5.08 g/cm3 (Calculated)

Optical Data of GuilleminiteHide

Type:
Biaxial (-)
RI values:
nα = 1.720 nβ = 1.798 nγ = 1.805
2V:
Measured: 35° , Calculated: 32°
Birefringence:
0.085
Max Birefringence:
δ = 0.085
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r > v strong
Optical Extinction:
Parallel. X = c; Y = b; Z = a.
Pleochroism:
Strong
Comments:
X = bright yellow; Y = yellow; Z = colorless.

Chemistry of GuilleminiteHide

Mindat Formula:
Ba(UO2)3(SeO3)2O2 · 3H2O
Elements listed:
Ba, H, O, Se, U - search for minerals with similar chemistry

Crystallography of GuilleminiteHide

Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Space Group:
Pmn21
Cell Parameters:
a = 7.29 Å, b = 16.87 Å, c = 7.07 Å
Ratio:
a:b:c = 0.432 : 1 : 0.419
Unit Cell V:
869.48 ų (Calculated from Unit Cell)
Z:
2
Morphology:
As rectangular crystals, tabular on {010}. Forms include {001}, {010}, {001}, and minor {101}.
Comment:
Space group is P21nm

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005466GuilleminiteCooper M A, Hawthorne F C (1995) The crystal structure of guilleminite, a hydrated Ba-U-Se sheet structure The Canadian Mineralogist 33 1103-110919950293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
8.39 Å(100)
7.29 Å(100)
6.68 Å(60)
6.51 Å(20)
3.55 Å(80)
3.17 Å(40)
3.04 Å(60)
2.80 Å(60)
Comments:
ICDD 18-582.

Geological EnvironmentHide

Type Occurrence of GuilleminiteHide

Type Locality:
ⓘ Musonoi Mine, Kolwezi, Mutshatsha, Lualaba, DR Congo
General Appearance of Type Material:
Canary-yellow coatings and silky masses up to 1 cm2. In geodes, it forms tablets up to 0.4 x 0.2 mm.
Place of Conservation of Type Material:
National School of Mines, Paris, France.
National Museum of Natural History, Washington, D.C., USA, 119360.
Geological Setting of Type Material:
Oxidized zone of a uranium-selenium-copper deposit.
Associated Minerals at Type Locality:
MarthoziteMalachiteMalachiteDigenite
Reference:
Pierrot, R., Toussaint, J., Verbeek, T. (1965) La guilleminite, une nouvelle espèce minérale. Bulletin de la Société Française de Minéralogie et de Cristallographie, 88, 132-135.
Download:
https://rruff.info/rruff_1.0/uploads/BSFMC88_132.pdf

Synonyms of GuilleminiteHide

Other Language Names for GuilleminiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
37 photos of Guilleminite associated with MalachiteCu2(CO3)(OH)2
20 photos of Guilleminite associated with VandenbrandeiteCu(UO2)(OH)4
13 photos of Guilleminite associated with CuprosklodowskiteCu(UO2)2(SiO3OH)2 · 6H2O
11 photos of Guilleminite associated with DemesmaekeritePb2Cu5(UO2)2(SeO3)6(OH)6 · 2H2O
10 photos of Guilleminite associated with MarthoziteCu2+(UO2)3(SeO3)2O2 · 8H2O
10 photos of Guilleminite associated with DigeniteCu9S5
5 photos of Guilleminite associated with WulfenitePb(MoO4)
5 photos of Guilleminite associated with TorberniteCu(UO2)2(PO4)2 · 12H2O
4 photos of Guilleminite associated with KasolitePb(UO2)(SiO4) · H2O
3 photos of Guilleminite associated with DerriksiteCu4(UO2)(SeO3)2(OH)6

Related Minerals - Strunz-mindat GroupingHide

4.JJ.PetermegawiteAl6(Se4+O3)3[SiO3(OH)](OH)9 · 10H2OOrth. mm2 : Cmc21
4.JJ.BorzęckiitePb(UO2)3(SeO3)2O2 · 3H2OOrth. mm2
4.JJ.05MarthoziteCu2+(UO2)3(SeO3)2O2 · 8H2OOrth. mm2
4.JJ.15PiretiteCa(UO2)3(SeO3)2(OH)4 · 4H2OOrth.
4.JJ.20DemesmaekeritePb2Cu5(UO2)2(SeO3)6(OH)6 · 2H2OTric. 1 : P1
4.JJ.25Haynesite(UO2)3(OH)2(SeO3)2 · 5H2OOrth.
4.JJ.30FavreauitePbBiCu6O4(SeO3)4(OH) · H2OTet. 4/m : P4/n

Fluorescence of GuilleminiteHide

In UV light:
Not fluorescent.

Other InformationHide

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

Internet Links for GuilleminiteHide

References for GuilleminiteHide

Localities for GuilleminiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
DR Congo
 
  • Haut-Katanga
    • Kambove Territory
      • Shinkolobwe
Deliens +1 other reference
  • Lualaba
    • Mutshatsha
      • Kolwezi
Pierrot et al. (1965) +2 other references
France
 
  • Auvergne-Rhône-Alpes
    • Puy-de-Dôme
      • Clermont-Ferrand
        • Olloix
- (1998)
Spain
 
  • Catalonia
    • Lleida
      • El Pallars Jussà
        • La Vall Fosca
          • La Torre de Cabdella
            • Castell-estaó
Castillo-Oliver et al. (2019)
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