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Carboirite

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Formula:
FeAl2(GeO4)O(OH)2
System:
Triclinic
Colour:
Green
Lustre:
Vitreous
Hardness:
6
Name:
Named after the type locality, Carboire, Ariège, Midi-Pyrénées, France.
Carboirite-Chloritoid Series.


Classification of Carboirite

IMA status:
Approved
Strunz 8th ed.:
4/C.22-10
Nickel-Strunz 10th (pending) ed.:
9.J0.05

9 : SILICATES (Germanates)
J : Germanates
0 :
Dana 8th ed.:
52.3.3.4

52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Hey's CIM Ref.:
7.11.17

7 : Oxides and Hydroxides
11 : Oxides of Sn and Pb

Physical Properties of Carboirite

Lustre:
Vitreous
Colour:
Green
Hardness (Mohs):
6

Optical Data of Carboirite

Type:
Biaxial (+)
RI values:
nα = 1.731 nβ = 1.735 nγ = 1.740
2V:
Measured: 65° to 70°
Max Birefringence:
δ = 0.009
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
High

Chemical Properties of Carboirite

Formula:
FeAl2(GeO4)O(OH)2
IMA Formula:
Fe2+Al2GeO5(OH)2
Elements listed in formula:
Al, Fe, Ge, H, O - search for minerals with similar chemistry

Crystallography of Carboirite

Crystal System:
Triclinic
Cell Parameters:
a = 9.51 Å, b = 5.56 Å, c = 9.29 Å
α = 96.08°, β = 101.52°, γ = 89.45°
Ratio:
a:b:c = 1.71 : 1 : 1.671
Unit Cell Volume:
V 478.58 ų (Calculated from Unit Cell)
Twinning:
Polysynthetic twinning // to (001).

Type Occurrence of Carboirite

Type Locality:
Carboire, Ariège, Occitanie, France

Relationship of Carboirite to other Species

Series:
Forms a series with Chloritoid (see here)
Member of:
Chloritoid Group
Other Members of Group:
Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2
MagnesiochloritoidMgAl2(SiO4)O(OH)2
Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Related Minerals - Nickel-Strunz Grouping):
9.J0.10BartelkeitePb(Fe2+Ge)[Ge2O7](OH)2 · H2O
9.J0.15OtjisumeitePbGe4O9
Related Minerals - Hey's Index Grouping:
7.11.1RomarchiteSnO
7.11.2CassiteriteSnO2
7.11.4SchoenfliesiteMg[Sn(OH)6]
7.11.5BurtiteCa[Sn(OH)6]
7.11.6VismirnoviteZn[Sn(OH)6]
7.11.7WickmaniteMn2+[Sn(OH)6]
7.11.8TetrawickmaniteMn2+[Sn4+(OH)6]
7.11.9JeanbandyiteFe3+xFe2+1-xSn(OH)6-xOx (1 ≥ x > 0.5)
7.11.10NataniteFe2+[Sn(OH)6]
7.11.11Mushistonite(Cu,Zn,Fe2+)[Sn(OH)6]
7.11.12Ferronigerite-2N1S(Al,Fe,Zn)2(Al,Sn)6O11(OH)
7.11.13Magnesionigerite
7.11.14ArgutiteGeO2
7.11.15BrunogeieriteFe22+Ge4+O4
7.11.16StottiteFe2+[Ge4+(OH)6]
7.11.18OtjisumeitePbGe4O9
7.11.19BartelkeitePb(Fe2+Ge)[Ge2O7](OH)2 · H2O
7.11.20MassicotPbO
7.11.21LithargePbO
7.11.22MiniumPb3O4
7.11.23PlattneritePbO2
7.11.24Scrutinyiteα-PbO2
7.11.25MurdochitePbCu6O8-x(Cl,Br)2x where x<=0.5
7.11.26MacedonitePbTiO3
7.11.27CesàrolitePb(Mn4+)3O6(OH)2
7.11.28CoronaditePb(Mn64+Mn23+)O16
7.11.29QuenselitePbMnO2(OH)
7.11.30PlumboferritePb2(Fe3+,Mn2+,Mg)11O19
7.11.31Magnetoplumbite(Pb,Mn)(Fe,Mn)12O19
7.11.32SenaitePb(Mn,Y,U)(Fe,Zn)2(Ti,Fe,Cr,V)18(O,OH)38

Other Names for Carboirite

Synonyms:

IMA1980-066

Name in Other Languages:
German:Carboirit
Spanish:Carboirita

Other Information

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 Carboirite

Reference List:
Johan, Z.; Oudin, E. & Picot, P. (1983): Germanium and gallium analogs of silicates and oxides from zinc deposits of the French central Pyrenees; argutite and carboirite, two new mineral species. Tschermaks Mineralogische und Petrographische Mitteilungen 31, 97-119. (in French)

American Mineralogist: 69: 406.

Internet Links for Carboirite

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https://www.mindat.org/min-893.html
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    • Localities for Carboirite

    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.
    (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.
    France (TL)
     
    • Occitanie
      • Ariège
    		[Tschermaks Min.Petr.Mitt.(1983) 31, 97-119; Nickel & Nichols, 1991 - "Mineral Reference Manual" p35]
    Mineral and/or Locality  
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