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About PhurcaliteHide

Ca2(UO2)3(PO4)2O2 · 7H2O
Adamantine, Vitreous
Crystal System:
Named by M. Deliens and P. Piret in 1978 for the composition, that includes PHosphate, URanyl, and CAlcium.
This page provides mineralogical data about Phurcalite.

Classification of PhurcaliteHide

Approval year:

E : Uranyl phosphates and arsenates
C : UO2:RO4 = 3:2

4 : (AB)5(XO4)2Zq·xH2O

19 : Phosphates
11 : Phosphates of U

Physical Properties of PhurcaliteHide

Adamantine, Vitreous
{001} and {010}, perfect. Also {100}.

Optical Data of PhurcaliteHide

Biaxial (-)
RI values:
nα = 1.690 nβ = 1.730 nγ = 1.749
Measured: 68° , Calculated: 66°
Max Birefringence:
δ = 0.059
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
weak to moderate
X bright yellow, Y very pale yellow.

Chemical Properties of PhurcaliteHide

Ca2(UO2)3(PO4)2O2 · 7H2O
IMA Formula:
Ca2(UO2)3O2(PO4)2 · 7H2O

Crystallography of PhurcaliteHide

Crystal System:
Tablets flattened on [010] and elongated on [001].

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005255PhurcaliteAtencio D, Neumann R, Silva A J G C, Mascarenhas Y P (1991) Phurcalite from Perus, San Paulo, Brazil, and redetermination of its crystal structure The Canadian Mineralogist 29 95-1051991Perus, San Paulo, Brazil0293
CIF Raw Data - click here to close

Type Occurrence of PhurcaliteHide

Place of Conservation of Type Material:
Musee royal de l'Afrique centrale, Tervuren, Belgium, RGM 13.388.
Deliens, M., Piret, P. (1978) La phurcalite, Ca2(UO2)3(PO4)2(OH)4·4H2O, nouveau mineral. Bulletin de Minéralogie: 101: 356-358.

Synonyms of PhurcaliteHide

Other Language Names for PhurcaliteHide

Simplified Chinese:束磷钙铀矿

Relationship of Phurcalite to other SpeciesHide

Other Members of this group:
AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b
DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmma
DumontitePb2(UO2)3O2(PO4)2 · 5H2OMon. 2/m : P21/m
Françoisite-(Ce)(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2OMon. 2/m : P21/b
Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon.
HügelitePb2(UO2)3(AsO4)2O2 · 5H2OMon.
PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
PhuralumiteAl2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9Mon. 2/m
UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon.
VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth.
YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmcm

Common AssociatesHide

Associated Minerals Based on Photo Data:
6 photos of Phurcalite associated with AutuniteCa(UO2)2(PO4)2 · 10-12H2O
4 photos of Phurcalite associated with TorberniteCu(UO2)2(PO4)2 · 12H2O
2 photos of Phurcalite associated with BrochantiteCu4(SO4)(OH)6
2 photos of Phurcalite associated with MetatorberniteCu(UO2)2(PO4)2 · 8H2O
1 photo of Phurcalite associated with HaiweeiteCa(UO2)2[Si5O12(OH)2] · 6H2O
1 photo of Phurcalite associated with Smoky QuartzSiO2
1 photo of Phurcalite associated with QuartzSiO2
1 photo of Phurcalite associated with UranophaneCa(UO2)2(SiO3OH)2 · 5H2O
1 photo of Phurcalite associated with MalachiteCu2(CO3)(OH)2
1 photo of Phurcalite associated with PseudomalachiteCu5(PO4)2(OH)4

Related Minerals - Nickel-Strunz GroupingHide

8.EC.05Françoisite-(Nd)(Nd,Ce,Sm)(UO2)3(PO4)2O(OH) · 6H2OMon.
8.EC.05PhuralumiteAl2[(UO2)3(PO4)2O(OH)](OH)3(H2O)9Mon. 2/m
8.EC.05UpaliteAl(UO2)3(PO4)2O(OH) · 7H2OMon.
8.EC.05Françoisite-(Ce)(Ce,Nd,Ca)(UO2)3(PO4)2O(OH) · 6H2OMon. 2/m : P21/b
8.EC.10ArsenuranyliteCa(UO2)4(AsO4)2(OH)4 · 6H2OOrth.
8.EC.10DewindtiteH2Pb3(UO2)2(PO4)4O4 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmma
8.EC.10KivuiteTh(UO2)4(PO3OH)2(OH)8 · 7H2O
8.EC.10PhosphuranyliteKCa(H3O)3(UO2)7(PO4)4O4 · 8H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
8.EC.10YingjiangiteK2Ca(UO2)7(PO4)4(OH)6 · 6H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
8.EC.15DumontitePb2(UO2)3O2(PO4)2 · 5H2OMon. 2/m : P21/m
8.EC.15HügelitePb2(UO2)3(AsO4)2O2 · 5H2OMon.
8.EC.20MetavanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 2H2OOrth. mmm (2/m 2/m 2/m) : Fddd
8.EC.20VanmeersscheiteU6+(UO2)3(PO4)2(OH)6 · 4H2OOrth.
8.EC.20ArsenovanmeersscheiteU6+(UO2)3(AsO4)2(OH)6 · 4H2OOrth. mm2 : Pmn21
8.EC.25AlthupiteAlTh(UO2)7(PO4)4(OH)5O2 · 15H2OTric. 1 : P1
8.EC.30MunditeAl(UO2)3(PO4)2(OH)3 · 5.5H2OOrth.
8.EC.40BergeniteCa2Ba4(UO2)9(PO4)6O6 · 16H2OMon. 2/m : P21/b

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)Orth. mmm (2/m 2/m 2/m) : Cmca
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
19.11.13Ningyoite(U,Ca,Ce)2(PO4)2 · 1-2H2OOrth.
19.11.14Meta-autuniteCa(UO2)2(PO4)2 · 6H2OTet. 4/mmm (4/m 2/m 2/m)
19.11.15AutuniteCa(UO2)2(PO4)2 · 10-12H2OOrth. mmm (2/m 2/m 2/m) : Pnma
19.11.16Pseudo-autunite(H3O)4Ca2(UO2)2(PO4)4 · 5H2OOrth.
19.11.18PhosphuranyliteKCa(H3O)3(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.
19.11.24TrianguliteAl3(UO2)4(PO4)4(OH)5 · 5H2OTric.
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)2O(OH)](OH)3(H2O)9Mon. 2/m
19.11.30MoreauiteAl3(UO2)(PO4)3(OH)2 · 13H2OMon. 2/m : P21/b
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.
19.11.35KivuiteTh(UO2)4(PO3OH)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)3O2(PO4)2 · 5H2OMon. 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 PhurcaliteHide

Not fluorescent in UV.

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 PhurcaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Deliens, M., Piret, P. (1978) La phurcalite, Ca2(UO2)3(PO4)2(OH)4·4H2O, nouveau mineral. Bulletin de Minéralogie: 101: 356-358.
Fleischer, M. (1978) New mineral names. American Mineralogist: 63: 1282-1284.
Piret, P., Declercq, J.-P. (1978) Phurcalite. Acta Crystallographica: B34: 1677-1679.
Fleischer, M., Chao, G.Y., Pabst, A. (1979) New mineral names. American Mineralogist: 64: 241-245.
Braithwaite, R. S. W.; Paar, W. H.; Chisholm, J. E. (1989): Phurcalite from Dartmoor, southwest England, and its identity with 'nisaite' from Portugal. Mineralogical Magazine 53, 583-589.
Jambor, J.L., Puziewicz, J. (1990) New mineral names. American Mineralogist: 75: 1209-1216.
Atencio, D., Neumann, R., Silva, A.J.G.C., Mascarenhas, Y.P. (1991) Phurcalite from Perus, São Paulo, Brazil, and redetermination of its crystal structure. Canadian Mineralogist: 29: 95-105.
Jambor, J.L., Grew, E.S. (1992) New mineral names. American Mineralogist: 77: 207-213.
Burns, P.C. (2005) U6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.
Fan, G., Yu, A., Ge, X., Ma, L., Wang, Q. (2014) Mineralogy of phurcalite discovered for the first time in China. Acta Petrologica et Mineralogica: 33(1): 95-101. (in Chinese with English abstract).
Plášil, J., Kiefer, B., Ghazisaeed, S., Philippo, S. (2020) Hydrogen bonding in the crystal structure of phurcalite, Ca2[(UO2)3O2(PO4)2]·7H2O: single-crystal X-ray study and TORQUE calculations. Acta Crystallographica B, 76, DOI: 10.1107/S2052520620005739.

Internet Links for PhurcaliteHide

Localities for PhurcaliteHide

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.
  • Catamarca Province
O. Morello y C. N. Reyes Encinas (1990). Estudio mineralógico de nueve muestras procedentes de la Sierra de Fiambalá, dpto. Tinogasta, Catamarca. Informe DEE N° 33-90, Comisión Nacional de Energía Atómica. Inédito.
O. Morello y C. N. Reyes Encinas (1990). Estudio mineralógico de nueve muestras procedentes de la Sierra de Fiambalá, dpto. Tinogasta, Catamarca. Informe DEE N° 33-90, Comisión Nacional de Energía Atómica. Inédito.
M. E. Saulnier y F. Greco (1988). Estudio mineralógico de cuatro muestras procedentes de la Manifestación Las Termas del área de Los Ratones, Fiambalá, Tinogasta, Catamarca. Informe DEE N° 1-88, Comisión Nacional de Energía Atómica. Inédito.
  • Queensland
    • Cloncurry Shire
      • Cloncurry
Australian Journal of Mineralogy 9(1):48
  • South Australia
    • Olary Province
      • Radium Hill area
Elliott, P., Plášil, J., Petříček, V., Čejka, J., Bindi, L. (2019) Twinning and incommensurate modulation in baumoite, Ba0.5[(UO2)3O8Mo2(OH)3](H2O)∼3, the first natural Ba uranyl molybdate. Mineralogical Magazine: 83(4): 507-514.
The mines & minerals of the Olary province of S.A. - Radium Hill & New Luxemburg Mining Areas. K.R. Kakoschke & G.L. Francis. Self Published.
  • Carinthia
    • Villach-Land District
      • Fresach
        • Laas
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • São Paulo
    • São Paulo
Atencio, D.E.A. (1991). "Phurcalite from Perus Sao Paulo Brazil and redetermination of its crystal structure." Canadian Mineralogist, 29(1),pp:95-106.; D Atencio & R Hypolito ()Fosfatos e silicatos secunderos de uranio de Perus, Sao Paulo
Fosfatos e Silicatos Secundários de Urânio de Perus, São Paulo - Atencio, Daniel and Hypolito, Raphael - Revista Brasileira de Geociências, março de 1994
  • Atacama
    • Copiapó Province
      • Quebrada San Miguel
        • Los Azules mine
A.Molina & M. Dini collections - based on analysis.
      • Tierra Amarilla
samples identified by Gerhard Möhn
  • Guangdong
    • Shaoguan
      • Wengyuan Co.
        • Xiazhuang Uranium ore field (Xiwang Uranium ore field)
Guang Fan, Apeng Yu, Xiangkun Ge, Likui Ma, and Quantao Wang (2014): Acta Petrologica et Mineralogica 33(1), 95-101
Czech Republic
  • Hradec Králové Region
    • Trutnov District
      • Špindlerův Mlýn (Spindlermühle)
        • Medvědín
J. Plasil (SC-XRD)
  • Karlovy Vary Region
    • Karlovy Vary District
Collected by Jan Hloušek, identified by J. Plasil; publication in due
DR Congo
  • Haut-Katanga
    • Kambove District
      • Shinkolobwe
Deliens, M. (1996) Overzicht van de mineralogie van de koper-, kobalt- en uraniumvoorkomens in Zuid-Shaba (Zaïre). Pages 35-49 in: Schatten der Aarde. Van mineraal tot juweel. Tentoonstelling in de abdij Saint-Gérard de Brogne van 27 april tot 27 oktober 1996. Catalogus opgemaakt onder de leiding van R. Warin, AGAB en P. Van hee, MKA (in Dutch).
  • Red Sea Governorate
    • Abu Ramad
Ehab K. Abu Zeid (2020): Autunite-Group Minerals and Their Paragenesis from the Sheared Granite of Gabal El Sela, South Eastern Desert, Egypt. Open Journal of Geology 10, 703-725.
  • Nouvelle-Aquitaine
    • Corrèze
      • Ussel
        • Davignac
Le Règne Minéral, Hors Série IV (1998), p. 48
  • Baden-Württemberg
    • Freiburg Region
      • Rottweil
        • Schenkenzell
          • Wittichen
Walenta (1994); Markl, G. & Slotta, C. (2011): Die Uranmineralien des Lagerstättenreviers Wittichen im mittleren Schwarzwald. Lapis 36 (3), 25-37; 54 (in German).
  • Bavaria
    • Lower Bavaria
      • Freyung-Grafenau District
        • Waldkirchen
          • Oberfrauenwald
Florian Wrobel specimen
      • Regen District
        • Lindberg
          • Pauliberg
  • Saxony
    • Vogtlandkreis
      • Bergen
M. Deliens & P. Piret (1978) Bulletin de Minéralogie 101, 356-358
  • Rajasthan
    • Udaipur Division
Saini, S. N.; Rahman, M.; Roy, M. K.; Singh, G. (2004): Uranium mineralisation in Lower Proterozoic basal quartzite of Putholi-Hamirgarh basin, Chittorgarh district, Rajasthan. Exploration and Research for Atomic Minerals 15, 147-153.
Singh, Yamuna; Singh, K. D. P.; Bhatt, A. K. (1999): Phurcalite: a rare secondary calcium uranium phosphate mineral from Putholi, Chittaurgarh district, Rajasthan. Journal of the Geological Society of India 53, 355-357.
  • Erongo Region
    • Karibib Constituency
E. Schnaitmann, F. Brandstätter, U. Kolitsch and G. Niedermayr (2008): Die „Gitterquarz“-Paragenese aus dem Erongo, Namibia. Mineralien-Welt 20 (1), 55-63.
  • Portalegre
    • Nisa
Luis Casinhas collection
  • Viseu
    • Sátão
      • Ferreira de Aves
        • Aldeia Nova
César Menor-Salván
  • England
    • Devon
      • West Devon
        • Whitchurch
Braitwaite, R., Paar, W., and Chisholm, J., 1989, Phurcalite from Dartmoor, Southwest England,and its Identity with 'Nisaite' from Portugal, Mineralogical Magazine, 53:583-589. Min.Rec.: 20(5):395.
  • California
    • Kern Co.
      • Shale Hills
Braitwaite, R., Paar, W., and Chisholm, J., 1989, Phurcalite from Dartmoor, Southwest England,and its Identity with 'Nisaite' from Portugal, Mineralogical Magazine, 53:583-589.
      • Taft
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 329.
  • Nevada
    • Esmeralda Co.
Tony Nikischer
  • Utah
    • San Juan Co.
      • Red Canyon
Min News 3:9 p5-6
  • Southern Province
    • Siavonga District
      • Mutanga uranium project
Randabel, J., & Lusambo, V. (2018). The Karoo Sandstone-Hosted Uranium Deposit at Dibwe East, Mutanga, Zambia (No. IAEA-CN--261).
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