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About FrancoanelliteHide

Franco Anelli
K3Al5(PO3OH)6(PO4)2 · 12H2O
Yellowish white
1 - 2
Crystal System:
Named for Franco Anelli (18 October 1899, Lodi, Lombardy, Italy - 23 October 1977, Bari, Apulia, Italy), professor of geography and speleologist, University of Bari, Italy, who discovered the Castellana Caves in which the mineral was found.
This page provides mineralogical data about Francoanellite.

Classification of FrancoanelliteHide


C : Phosphates without additional anions, with H2O
H : With large and medium-sized cations, RO4:H2O < 1:1

3 : Miscellaneous

19 : Phosphates
8 : Phosphates of Al and other metals

Physical Properties of FrancoanelliteHide

Yellowish white
1 - 2 on Mohs scale

Optical Data of FrancoanelliteHide

Uniaxial (+)
RI values:
nω = 1.510 nε = 1.515
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of FrancoanelliteHide

K3Al5(PO3OH)6(PO4)2 · 12H2O

Crystallography of FrancoanelliteHide

Crystal System:
Cell Parameters:
a = 8.71 Å, c = 82.5 Å
a:c = 1 : 9.472
Unit Cell V:
5,420.27 ų (Calculated from Unit Cell)

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0015844FrancoanelliteDick S, Zeiske T (1998) Francoanellit K3Al5(HPO4)6(PO4)2*12H2O: struktur und synthese durch topochemische entwasserung von taranakit Zeitschrift fur Naturforschung B53 711-7191998synthetic0293
CIF Raw Data - click here to close

Type Occurrence of FrancoanelliteHide

Place of Conservation of Type Material:
Mineralogical Museum, University of Bari, Bari, Italy.
National School of Mines, Paris, France.
Geological Setting of Type Material:
Limestone cave.

Synonyms of FrancoanelliteHide

Other Language Names for FrancoanelliteHide

Related Minerals - Nickel-Strunz GroupingHide

8.CH.05WalentaiteFe3+3(P0.84As0.16O4)2(O,OH)6As3+2.56Ca0.42Na0.28Mn2+0.35Fe2+0.30O6.1(OH)0.9(H2O)0.9Orth. mmm (2/m 2/m 2/m) : Imma
8.CH.10AnapaiteCa2Fe2+(PO4)2 · 4H2OTric. 1 : P1
8.CH.15PicropharmacoliteCa4Mg(AsO4)2(HAsO4)2 · 11H2OTric. 1 : P1
8.CH.20Dittmarite(NH4)Mg(PO4) · H2OOrth.
8.CH.20Niahite(NH4)(Mn2+,Mg)(PO4) · H2OOrth. mm2 : Pmn21
8.CH.25Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2OTrig. 3m (3 2/m) : R3c
8.CH.30Schertelite(NH4)2MgH2(PO4)2 · 4H2OOrth.
8.CH.35Hannayite(NH4)2Mg3H4(PO4)4 · 8H2OTric. 1 : P1
8.CH.40Struvite(NH4)Mg(PO4) · 6H2OOrth. mm2
8.CH.40Struvite-(K)KMg(PO4) · 6H2OOrth. mm2 : Pmn21
8.CH.40HazeniteKNaMg2(PO4)2 · 14H2OOrth. mm2
8.CH.45Rimkorolgite(Mg,Mn)5(Ba,Sr,Ca)(PO4)4 · 8H2OOrth.
8.CH.50BakhchisaraitseviteNa2Mg5(PO4)4 · 7H2OMon.
8.CH.55FahleiteCaZn5Fe3+2(AsO4)6 · 14H2OOrth.
8.CH.55SmolyaninoviteCo3Fe3+2(AsO4)4 · 11H2OOrth.
8.CH.60Barahonaite-(Al)(Ca,Cu,Na,Fe3+,Al)12Al2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b
8.CH.60Barahonaite-(Fe)(Ca,Cu,Na,Fe3+,Al)12Fe3+2(AsO4)8(OH,Cl)x · nH2OMon. 2/m : P2/b

Related Minerals - Dana Grouping (8th Ed.)Hide · 8H2OTric. 1 : P1

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

19.8.1MontebrasiteLiAl(PO4)(OH)Tric. 1 : P1
19.8.2BrazilianiteNaAl3(PO4)2(OH)4Mon. 2/m : P2/b
19.8.3WarditeNaAl3(PO4)2(OH)4 · 2H2OTet. 4 2 2 : P41 21 2
19.8.4TancoiteLiNa2Al(PO4)(PO3OH)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
19.8.6TinsleyiteKAl2(PO4)2(OH) · 2H2OMon.
19.8.7Taranakite(K,NH4)Al3(PO4)3(OH) · 9H2OTrig. 3m (3 2/m) : R3c
19.8.9GordoniteMgAl2(PO4)2(OH)2 · 8H2OTric. 1 : P1
19.8.10AldermaniteMg5Al12(PO4)8(OH)22 · 32H2OOrth.
19.8.11OveriteCaMgAl(PO4)2(OH) · 4H2OOrth. mmm (2/m 2/m 2/m) : Pbca
19.8.12MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2OMon. 2 : B2
19.8.14FoggiteCaAl(PO4)(OH)2 · H2OOrth. mmm (2/m 2/m 2/m)
19.8.15GatumbaiteCaAl2(PO4)2(OH)2 · H2OMon. 2/m : P2/m
19.8.16CrandalliteCaAl3(PO4)(PO3OH)(OH)6Trig. 3m (3 2/m) : R3m
19.8.17Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2OMon.
19.8.20Millisite(Na,K)CaAl6(PO4)4(OH)9 · 3H2OTet.
19.8.21EnglishiteK3Na2Ca10Al15(PO4)21(OH)7 · 26H2OMon. 2/m
19.8.22KleemaniteZnAl2(PO4)2(OH)2 · 3H2OMon.
19.8.23MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2OOrth.
19.8.24PaulkerriteK(Mg,Mn2+)2(Fe3+,Al,Ti,Mg)2Ti(PO4)4(OH)3 · 15H2OOrth. mmm (2/m 2/m 2/m) : Pbca

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 FrancoanelliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Balenzano, F., Dell´Anna, L., Di Pierro, M. (1976) Francoanellite, H6K3Al5(PO4)8·13H2O, a new mineral from the caves of Castellana, Puglia, southern Italy. Neues Jahrbuch für Mineralogie Monatshefte: 1976: 49-57.
Fleischer, M., Pabst, A., Cabri, L.J. (1976) New mineral names. American Mineralogist: 61: 1053-1056.
Dick, S., Zeiske, T. (1998) Francoanellit K3Al5(HPO4)6(PO4)2·12H2O: struktur und synthese durch topochemische entwässerung von taranakit. Zeitschrift für Naturforschung B Chemical Science: 53: 711-719.

Internet Links for FrancoanelliteHide

Localities for FrancoanelliteHide

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.
  • Australian Capital Territory
    • Paddys River District
      • Paddy's River Cu Mine
Anthony, Bideaux, Bladh, Nichols: Handbook of Mineralogy, Vol. IV; McQueen, Ken G.; J. R. Caldwell; P. W. Millsteed (July 1988). "Primary and Secondary Minerals at the Paddy's River Mine, Australian Capital Territory". Australian Mineralogist 3: 83–100.
Italy (TL)
  • Apulia
    • Metropolitan City of Bari
      • Castellana Grotte
Balenzano, F., Dell'Anna, L., Di Pierro, M. (1976) Francoanellite, H6K3Al5(PO4)8•13H2O, a new mineral from the caves of Castellana, Puglia, southern Italy. Neues Jahrbuch fϋr Mineralogie Monatshefte, 2, 49-57.
      • Polignano a Mare
Balenzano, F., Dell'Anna, L., Di Pierro, M. (1979): Francoanellite from the "Grotta della Rondinella" (Little Swallow cave) in Apulia (southern Italy): a new occurrence and new data. Neues Jahrbuch für Mineralogie Monatshefte, 8, 363-372; Dell'Anna, L., Fiore, S., Laviano, R. (1989): I fosfati di cavità carsiche pugliesi: giaciture, natura e genesi. Atti del XV Congresso Nazionale di Speleologia. Castellana Grotte 10-13 settembre 1987. Comune di Castellana Grotte e Gruppo Puglia Grotte, Castellana Grotte, 171-187.
    • Taranto Province
      • Martina Franca
Dell'Anna, L., Fiore, S., Laviano, R. (1989): I fosfati di cavità carsiche pugliesi: giaciture, natura e genesi. Atti del XV Congresso Nazionale di Speleologia. Castellana Grotte 10-13 settembre 1987. Comune di Castellana Grotte e Gruppo Puglia Grotte, Castellana Grotte, 171-187.
  • Friuli Venezia Giulia
    • Gorizia Province
      • Sagrado
        • San Martino del Carso
Cancian, G. (1984): I fosfati della "Grotta ad Est di San Martino del Carso" (Gorizia): brushite, idrossiapatite, francoanellite, taranakite. Atti III Covegno Triveneto di Speleologia, 17-18 nov. 1984, Vicenza, 1-8.
  • Brașov
Marincea, Ş., Dumitraş, D. g., Diaconu, G., & Fransolet, a. m. (2004) Mineralogical Data on the Bat Guano Deposit from Gura Ponicovei Cave (Almaj Mountains, Romania). Romanian Journal of Mineral Deposits 81:126-129
  • Constanța
Dumitras D, Marincea S, Diaconu G (2004) Thermal diagenesis in the phosphate-sulfate sequence from Gura Dobrogei Cave, Dobrogea, Romania. 21 st meeting of the International Mineralogical Association. p 71
South Korea
  • Gangwon Province
    • Yeongwol County
Jun, Chang-Pyo ; Lee, Seong-Joo ; Kong, Dal-Yong ; Kang, Il-Mo ; Song, Yun-Goo (2010) Mineralogy of Secondary Phosphates and Sulfates Precipitated within the Sequence of Bat Guano Deposits in the Gossi Cave, Korea. Journal of the Mineralogical Society of Korea, volume 23, issue 4, 2010, Pages 395-402
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