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Sigloite

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Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Sigloite

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
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About SigloiteHide

Siglo XX Mine, underground mining scene, ca. 1910

Siglo Veinte Mine, Llallagua, Rafael Bustillo, Potosí, Bolivia
Formula:
Fe3+Al2(PO4)2(OH)3 · 7H2O
Colour:
Light brown, straw-yellow
Hardness:
3
Crystal System:
Triclinic
Name:
Named after its discovery locality, the Siglo Veinte Mine (Siglo XX Mine), Llallagua, Bustillos Province, Potosí Department, Bolivia.
This page provides mineralogical data about Sigloite.


Classification of SigloiteHide

IMA status:
Approved
Strunz 8th ed.:
7/D.10-40
Nickel-Strunz 10th (pending) ed.:
8.DC.30

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
Dana 8th ed.:
42.11.14.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:
19.14.26

19 : Phosphates
14 : Phosphates of Fe and other metals

Pronounciation of SigloiteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of SigloiteHide

Colour:
Light brown, straw-yellow
Hardness:
3 on Mohs scale

Optical Data of SigloiteHide

Type:
Biaxial (+)
RI values:
nα = 1.563 nβ = 1.586 nγ = 1.619
2V:
Measured: 76° , Calculated: 82°
Max Birefringence:
δ = 0.056
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
strong

Chemical Properties of SigloiteHide

Formula:
Fe3+Al2(PO4)2(OH)3 · 7H2O
Elements listed:
Al, Fe, H, O, P - search for minerals with similar chemistry

Crystallography of SigloiteHide

Crystal System:
Triclinic
Cell Parameters:
a = 5.26 Å, b = 10.52 Å, c = 7.06 Å
α = 106.97°, β = 111.5°, γ = 69.5°
Ratio:
a:b:c = 0.5 : 1 : 0.671
Unit Cell V:
334.42 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of SigloiteHide

Synonyms of SigloiteHide

Other Language Names for SigloiteHide

German:Sigloit
Spanish:Sigloita

Relationship of Sigloite to other SpeciesHide

Member of:
Laueite Group > Laueite Supergroup
Other Members of this group:
FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
KummeriteMn2+Fe3+Al(PO4)2(OH)2·8H2OTric. 1 : P1
LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.
ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Paravauxite349 photos of Sigloite associated with Paravauxite on mindat.org.
Vauxite75 photos of Sigloite associated with Vauxite on mindat.org.
Metavauxite69 photos of Sigloite associated with Metavauxite on mindat.org.
Wavellite30 photos of Sigloite associated with Wavellite on mindat.org.
Pyrite20 photos of Sigloite associated with Pyrite on mindat.org.
Quartz17 photos of Sigloite associated with Quartz on mindat.org.
Franckeite14 photos of Sigloite associated with Franckeite on mindat.org.
Greenockite8 photos of Sigloite associated with Greenockite on mindat.org.
Römerite5 photos of Sigloite associated with Römerite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2OMon.
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2OOrth. 2 2 2 : P21 21 21
8.DC.10LegranditeZn2(AsO4)(OH) · H2OMon. 2/m : P21/b
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2OMon.
8.DC.15ArthuriteCuFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15EarlshannoniteMn2+Fe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15OjuelaiteZnFe3+2(AsO4)2(OH)2 · 4H2OMon.
8.DC.15WhitmoreiteFe2+Fe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15Cobaltarthurite(Co,Mg)Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15BendadaiteFe2+Fe3+2(AsO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15KunatiteCuFe3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P21/b
8.DC.15UKI-2006-(PO:FeHZn)ZnFe3+2(PO4)2(OH)2 · 4H2OMon.
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3+2(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
8.DC.20BermaniteMn2+Mn3+2(PO4)2(OH)2 · 4H2OMon. 2/m : P2/b
8.DC.20CoralloiteMn2+Mn3+2(AsO4)2(OH)2 · 4H2OTric. 1 : P1
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2OMon.
8.DC.25FerristrunziteFe3+Fe3+2(PO4)2(OH)3 · 5H2OTric.
8.DC.25FerrostrunziteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric.
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.25MetavivianiteFe2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.25StrunziteMn2+Fe3+2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.27BerauniteFe2+Fe3+5(PO4)4(OH)5 · 6H2OMon. 2/m : B2/b
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30LaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30PseudolaueiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
8.DC.30StewartiteMn2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
8.DC.30FerrolaueiteFe2+Fe3+2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2OTric. 1 : P1
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2OTric. 1 : P1
8.DC.32TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2OTric. 1 : P1
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2OOrth.
8.DC.40CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2OTric.
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2OOrth. mmm (2/m 2/m 2/m)
8.DC.50AllanpringiteFe3+3(PO4)2(OH)3 · 5H2OMon. 2/m : P21/m
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2OTric. 1 : P1
8.DC.55MapimiteZn2Fe3+3(AsO4)3(OH)4 · 10H2OMon.
8.DC.57OgdensburgiteCa2Fe3+4(Zn,Mn2+)(AsO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmmm
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2OOrth. mmm (2/m 2/m 2/m)
8.DC.60CloncurryiteCu0.5(VO)0.5Al2(PO4)2F2 · 5H2OMon. 2/m : P21/b

Related Minerals - Dana Grouping (8th Ed.)Hide

42.11.14.1VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
42.11.14.2ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
42.11.14.4GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
42.11.14.5MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.14.1CyriloviteNaFe3+3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
19.14.2KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O, x = 0.33Mon. 2/m : P2/b
19.14.3Rosemaryite(Na,Ca,Mn)(Mn,Fe2+)(Fe3+,Mg)Al(PO4)3Mon. 2/m : P21/b
19.14.4Wyllieite(Na,Ca,Mn)(Mn,Fe)(Fe,Mg)Al(PO4)3Mon. 2/m
19.14.5Ferrowyllieite(Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3Mon. 2/m : P21/b
19.14.6NatrodufréniteNaFe2+Fe3+5(PO4)4(OH)6 · 2H2OMon.
19.14.7LeucophosphiteKFe3+2(PO4)2(OH) · 2H2OMon. 2/m : P21/b
19.14.8Spheniscidite(NH4,K)(Fe3+,Al)2(PO4)2(OH) · 2H2OMon.
19.14.9BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2OMon. 2/m : B2/b
19.14.10Satterlyite(Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6Trig. 3m (3 2/m) : P3 1m
19.14.11UshkoviteMgFe3+2(PO4)2(OH)2 · 8H2OTric.
19.14.12Garyansellite(Mg,Fe)3(PO4)2(OH,O) · 1.5H2OOrth. mmm (2/m 2/m 2/m)
19.14.13ThadeuiteCa(Mg,Fe2+)3(PO4)2(OH,F)2Orth. 2 2 2 : C2 2 21
19.14.14AnapaiteCa2Fe2+(PO4)2 · 4H2OTric. 1 : P1
19.14.15XanthoxeniteCa4Fe3+2(PO4)4(OH)2 · 3H2OTric. 1 : P1
19.14.16CalcioferriteCa2Fe3+2(PO4)3(OH) · 7H2OMon. 2/m : B2/b
19.14.17MitridatiteCa2Fe3+3(PO4)3O2 · 3H2OMon. 2/m : B2/b
19.14.18MélonjosephiteCaFe2+Fe3+(PO4)2(OH)
19.14.19DelvauxiteCaFe4(PO4,SO4)2(OH)8 · 4-6H2O not confirmed · Amor.
19.14.20CollinsiteCa2Mg(PO4)2 · 2H2OTric. 1 : P1
19.14.21SegeleriteCa2 Mg2 Fe3+2(PO4)4(OH)2 · 8H2OOrth. mmm (2/m 2/m 2/m) : Pcca
19.14.22KingsmountiteCa4(Fe2+,Mn2+)Al4(PO4)6(OH)4 · 12H2OMon. 2 : B2
19.14.23VauxiteFe2+Al2(PO4)2(OH)2 · 6H2OTric. 1 : P1
19.14.24MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OMon. 2/m : P21/b
19.14.25ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.14.27CacoxeniteFe3+24AlO6(PO4)17(OH)12 · 75H2OHex. 6/m : P63/m
19.14.28KoninckiteFe3+PO4 · 3H2OTet.
19.14.29LazuliteMgAl2(PO4)2(OH)2Mon. 2/m : P21/b
19.14.30ScorzaliteFe2+Al2(PO4)2(OH)2Mon. 2/m : P21/b
19.14.31Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
19.14.32Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2OTric.
19.14.33ZaïriteBiFe3+3(PO4)2(OH)6Trig. 3m (3 2/m) : R3m

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.

References for SigloiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogist (1962): 47: 1-8.
Mineralogy and Petrology (1988): 38: 201-211.
American Mineralogist (1989): 74: 1404.

Internet Links for SigloiteHide

Localities for SigloiteHide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Bolivia (TL)
 
  • Potosí
    • Rafael Bustillo
      • Llallagua
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: 973; American Mineralogist (1962): 47: 1-8; Mineralogical Record: 32: 474.
France
 
  • Occitanie
    • Tarn
      • Castelnau-de-Brassac
        • Fumade
Lheur, C. & Meisser, N. (2013): Nouveautés à Fumade (Tarn): clinobisvanite, meurigite-K, sigloite et sudoite. Le Règne Minéral, 110, 52-53.
USA
 
  • Arkansas
    • Polk Co.
      • Shady
Josef Vajdak (2002) Mineral News, 18, #1, 6.
    • Gaston Co.
      • Bessemer City
Kenny Gay Collection
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