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Triangulite

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Formula:
Al3(UO2)4(PO4)4(OH)5 · 5H2O
Colour:
Bright yellow
Crystal System:
Triclinic
Name:
Named for the triangular habit of its crystals.
Ranunculite-Triangulite Group


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Classification of TrianguliteHide

Approved
Approval Year:
1981
8.EB.45

8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
B : UO2:RO4 = 1:1
40.2a.34.1

40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
2a : AB2(XO4)2·xH2O, containing (UO2)2+
19.11.24

19 : Phosphates
11 : Phosphates of U

Pronounciation of TrianguliteHide

Pronounciation:
PlayRecorded byCountry
Jolyon & Katya RalphUnited Kingdom

Physical Properties of TrianguliteHide

Colour:
Bright yellow

Optical Data of TrianguliteHide

Type:
Biaxial (+)
RI values:
nα = 1.639 nβ = 1.665 nγ = 1.704
2V:
Measured: 80° , Calculated: 82°
Max Birefringence:
δ = 0.065
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak

Chemical Properties of TrianguliteHide

Formula:
Al3(UO2)4(PO4)4(OH)5 · 5H2O

Crystallography of TrianguliteHide

Crystal System:
Triclinic
Cell Parameters:
a = 10.39 Å, b = 10.56 Å, c = 10.6 Å
α = 116.4°, β = 107.8°, γ = 113.4°
Ratio:
a:b:c = 0.984 : 1 : 1.004
Unit Cell V:
774.22 ų (Calculated from Unit Cell)

Type Occurrence of TrianguliteHide

Synonyms of TrianguliteHide

Other Language Names for TrianguliteHide

German:Triangulit
Simplified Chinese:磷铝铀矿 V
Spanish:Triangulita

Related Minerals - Nickel-Strunz GroupingHide

8.EB.05AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
8.EB.05HeinrichiteBa(UO2)2(AsO4)2 · 10H2OMon. 2/m
8.EB.05KahleriteFe(UO2)2(AsO4)2 · 12H2OTet. 4/m : P42/n
8.EB.05Nováčekite-IMg(UO2)2(AsO4)2 · 12H2OTric. 1 : P1
8.EB.05SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
8.EB.05TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
8.EB.05UranospiniteCa(UO2)(AsO4)2 · 10H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.05Xiangjiangite(Fe3+,Al)(UO2)4(PO4)2(SO4)2(OH) · 22H2OTet.
8.EB.05ZeuneriteCu(UO2)2(AsO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
8.EB.05MetarauchiteNi(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.05RauchiteNi(UO2)2(AsO4)2 · 10H2OTric. 1 : P1
8.EB.10BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
8.EB.10LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
8.EB.10Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
8.EB.10MetasaléeiteMg(UO2)2(PO4)2 · 8H2O
8.EB.10Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
8.EB.10MetauranospiniteCa(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10MetaheinrichiteBa(UO2)2(AsO4)2 · 8H2OTet. 4mm
8.EB.10MetakahleriteFe2+(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetakirchheimeriteCo(UO2)2(AsO4)2 · 8H2OTric. 1 : P1
8.EB.10MetanováčekiteMg(UO2)2(AsO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
8.EB.10MetazeuneriteCu(UO2)2(AsO4)2 · 8H2OTet. 4/m : P42/n
8.EB.10PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OOrth.
8.EB.10Meta-lodèviteZn(UO2)2(AsO4)2 · 10H2O
8.EB.15AbernathyiteK(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/ncc
8.EB.15Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
8.EB.15Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Natrouranospinite(Na2,Ca)(UO2)2(AsO4)2 · 5H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Trögerite(H3O)(UO2)(AsO4) · 3H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
8.EB.15Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.
8.EB.15Uramarsite(NH4,H3O)2(UO2)2(AsO4,PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/mmm
8.EB.20ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
8.EB.20ChistyakovaiteAl(UO2)2(AsO4)2(F,OH) · 6.5H2OMon.
8.EB.25ArsenuranospathiteAl[(UO2)(AsO4)]2F(H2O)20Orth. mm2 : Pnn2
8.EB.25Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
8.EB.30Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.
8.EB.35CoconinoiteFe3+2Al2(UO2)2(PO4)4(SO4)(OH)2 · 20H2OMon.
8.EB.40RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
8.EB.50FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
8.EB.55SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.11.1LermontoviteU(PO4)(OH) · H2OOrth. mmm (2/m 2/m 2/m) : Ccca
19.11.2MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2OOrth. mmm (2/m 2/m 2/m) : Fddd
19.11.3VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth.
19.11.4Chernikovite(H3O)2(UO2)2(PO4)2 · 6H2OTet.
19.11.5VyacheslaviteU(PO4)(OH) · nH2OOrth.
19.11.6MetanatroautuniteNa(UO2)(PO4)(H2O)3Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
19.11.7YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.8Meta-ankoleiteK2(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
19.11.9Uramphite(NH4)2(UO2)2(PO4)2 · 6H2OTet.
19.11.10TorberniteCu(UO2)2(PO4)2 · 12H2OTet. 4/mmm (4/m 2/m 2/m) : I4/mmm
19.11.11MetatorberniteCu(UO2)2(PO4)2 · 8H2OTet. 4/m : P4/n
19.11.12SaléeiteMg(UO2)2(PO4)2 · 10H2OMon. 2/m : P21/b
19.11.13NingyoiteCaU(PO4)2 · 1-2H2OOrth.
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2OTet. 4/mmm (4/m 2/m 2/m)
19.11.15AutuniteCa(UO2)2(PO4)2 · 11H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
19.11.17PhurcaliteCa2(UO2)3(PO4)2O2 · 7H2OOrth.
19.11.18Phosphuranylite(H3O)3KCa(UO2)7(PO4)4O4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
19.11.19UlrichiteCaCu(UO2)(PO4)2 · 4H2OMon.
19.11.20BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b
19.11.21Metauranocircite-IBa(UO2)2(PO4)2 · 7H2OMon. 2 : P21
19.11.22UranocirciteBa(UO2)2(PO4)2 · 10H2OTet.
19.11.23RanunculiteHAl(UO2)(PO4)(OH)3 · 4H2OMon.
19.11.25MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2OOrth.
19.11.26UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon.
19.11.27FurongiteAl13(UO2)7(PO4)13(OH)14 · 58H2OTric. 1 : P1
19.11.28ThreadgolditeAl(UO2)2(PO4)2(OH) · 8H2OMon.
19.11.29PhuralumiteAl2(UO2)3(PO4)3(OH)2 · 13H2OMon.
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2O
19.11.31SabugaliteHAl(UO2)4(PO4)4 · 16H2OMon. 2/m : B2/m
19.11.32Uranospathite(Al,☐)(UO2)2(PO4)2F · 20(H2O,F)Orth. mm2 : Pnn2
19.11.33AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
19.11.34Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon.
19.11.35Kivuite(Th,Ca,Pb)(UO2)4(HPO4)2(OH)8 · 7H2O
19.11.36ParsonsitePb2(UO2)(PO4)2Tric. 1 : P1
19.11.37DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmma
19.11.38DumontitePb2(UO2)3(PO4)2(OH)4 · 3H2OMon. 2/m : P21/m
19.11.39PrzhevalskitePb2(UO2)3(PO4)2(OH)4 · 3H2OOrth.
19.11.40LehneriteMn2+(UO2)2(PO4)2 · 8H2OMon.
19.11.41BassetiteFe2+(UO2)2(PO4)2 · 10H2OMon. 2/m
19.11.42Vochtenite(Fe2+,Mg)Fe3+(UO2)4(PO4)4(OH) · 12-13H2OMon.

Fluorescence of TrianguliteHide

Fluorescent bright green under SW UV (at least the Rhyolite Ridge, Nevada, material).

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 TrianguliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Bulletin de la Société française de Minéralogie et de Cristallographie (1982): 105: 611-614.
American Mineralogist (1984): 69: 212.

Internet Links for TrianguliteHide

Localities for TrianguliteHide

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.
Democratic Republic of Congo (Zaïre) (TL)
 
  • Sud-Kivu
    • Mwenga
Bull.Minéral.(1982) 105, 611-614
Spain
 
  • Extremadura
    • Cáceres
      • Tejeda de Tiétar
http://www.foro-minerales.com/forum/viewtopic.php?t=6707
USA
 
  • Nevada
    • Esmeralda Co.
      • Silver Peak District
NBMG Spec Pub 31 Minerals of Nevada
Mineral and/or Locality  
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