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Ca4MgFe43+(PO4)6(OH)4 · 12H2O
Some of the Fe may be replaced by Al.
Sulphur-yellow, greenish ...
In allusion to its composition, containing CALCIum and iron (Latin = FERRum).
A phosphate mineral found as nodules and otherwise in phosphatic clay.

Classification of Calcioferrite

Approved, 'Grandfathered' (first described prior to 1959)

D : Phosphates, etc. with additional anions, with H2O
H : With large and medium-sized cations, (OH, etc.):RO4 < 1:1

11 : (AB)3(XO4)2Zq·xH2O

19 : Phosphates
14 : Phosphates of Fe and other metals

Occurrences of Calcioferrite

Type Occurrence of Calcioferrite

General Appearance of Type Material:
Geological Setting of Type Material:
Tertiary clay

Physical Properties of Calcioferrite

Diaphaneity (Transparency):
Transparent, Translucent, Opaque
Lustre pearly on cleavages
Sulphur-yellow, greenish yellow to green, yellowish white; yellow in transmitted light.
Hardness (Mohs):
One perfect parallel to the foliation; another, interrupted, perpendicular to the first; a third, also interrupted, oblique to the first.
2.51 - 2.53 g/cm3 (Measured)    2.65 g/cm3 (Calculated)

Crystallography of Calcioferrite

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 10.34Å, b = 24.2Å, c = 6.31Å
β = 91.5°
a:b:c = 0.427 : 1 : 0.261
Unit Cell Volume:
V 1,578.40 ų (Calculated from Unit Cell)
Crystals flattened on [010]. Forms parallel or radiating groups; foliated; nodular or reniform; massive.

Optical Data of Calcioferrite

Biaxial (-)
RI values:
nα = 1.572 - 1.604 nβ = 1.579 - 1.610 nγ = 1.583 - 1.612
Measured: 70° to 80°, Calculated: 72°
Max Birefringence:
δ = 0.011
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
r < v strong

Chemical Properties of Calcioferrite

Ca4MgFe43+(PO4)6(OH)4 · 12H2O

Some of the Fe may be replaced by Al.
Elements listed in formula:

Relationship of Calcioferrite to other Species

Other Members of Group:
KingsmountiteCa4(Fe2+,Mn2+)Al4(PO4)6(OH)4 · 12H2O
MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
SchooneriteZnMn2+Fe22+Fe3+(PO4)3(OH)2 · 9H2O
ZodaciteCa4Mn2+Fe43+(PO4)6(OH)4 · 12H2O
8.DH.05MinyuliteKAl2(PO4)2F · 4H2O
8.DH.10LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
8.DH.10Spheniscidite(NH4)Fe23+(PO4)2(OH) · 2H2O
8.DH.10TinsleyiteKAl2(PO4)2(OH) · 2H2O
8.DH.15Jahnsite-(CaMnFe)CaMn2+Fe22+Fe23+(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(CaMnMg)CaMn2+Mg2Fe23+(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(CaMnMn)CaMn2+Mn22+Fe23+(PO4)4(OH)2 · 8H2O
8.DH.15KeckiteCaMn2+(Fe3+Mn2+)Fe23+(PO4)4(OH)3 · 7H2O
8.DH.15Rittmannite(Mn2+,Ca)Mn2+(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)4(OH)2 · 8H2O
8.DH.15Whiteite-(CaFeMg)CaFe2+Mg2Al2(PO4)4(OH)2 · 8H2O
8.DH.15Whiteite-(CaMnMg)CaMn2+Mg2Al2(PO4)4(OH)2 · 8H2O
8.DH.15Whiteite-(MnFeMg)Mn2+Fe2+Mg2Al2(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(MnMnMn)Mn2+Mn2+Mn22+Fe23+(PO4)4(OH)2 · 8H2O
8.DH.15Kaluginite(Mn2+,Ca)MgFe3+(PO4)2(OH) · 4H2O
8.DH.15Jahnsite-(CaFeFe){Ca}{Fe2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(NaFeMg)NaFe3+Mg2Fe23+(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(NaMnMg){Na}{Mn3+}{Mg2}{Fe23+}(PO4)4(OH)2 · 8H2O
8.DH.15Jahnsite-(CaMgMg){Ca}{Mg}{Mg2}{Fe23+}(PO4)4(OH)2 · 8H2O
8.DH.20ManganosegeleriteMn22+Fe3+(PO4)2(OH) · 4H2O
8.DH.20OveriteCaMgAl(PO4)2(OH) · 4H2O
8.DH.20SegeleriteCaMgFe3+(PO4)2(OH) · 4H2O
8.DH.20WilhelmvierlingiteCaMn2+Fe3+(PO4)2(OH) · 2H2O
8.DH.20JuonniiteCaMgSc(PO4)2(OH) · 4H2O
8.DH.25KingsmountiteCa4Fe2+Al4(PO4)6(OH)4 · 12H2O
8.DH.25MontgomeryiteCa4MgAl4(PO4)6(OH)4 · 12H2O
8.DH.25ZodaciteCa4Mn2+Fe43+(PO4)6(OH)4 · 12H2O
8.DH.30ArseniosideriteCa2Fe33+O2(AsO4)3 · 3H2O
8.DH.30KolfaniteCa2Fe33+O2(AsO4)3 · 2H2O
8.DH.30MitridatiteCa2Fe33+O2(PO4)3 · 3H2O
8.DH.30PararobertsiteCa2Mn33+O2(PO4)3 · 3H2O
8.DH.30RobertsiteCa2Mn33+O2(PO4)3 · 3H2O
8.DH.30Sailaufite(Ca,Na,◻)2Mn33+O2(AsO4)2CO3 · 3H2O
8.DH.35MantienneiteKMg2Al2Ti(PO4)4(OH)3 · 15H2O
8.DH.35PaulkerriteKMg2TiFe23+(PO4)4(OH)3 · 15H2O
8.DH.35BenyacariteKTiMn22+Fe23+(PO4)4OF · 15H2O
8.DH.40XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
8.DH.45Mahnertite(Na,Ca,K)Cu3(AsO4)2Cl · 5H2O
8.DH.50AndyrobertsiteKCdCu5(AsO4)4[As(OH)2O2] · 2H2O
8.DH.50CalcioandyrobertsiteKCaCu5(AsO4)4[As(OH)2O2] · 2H2O
8.DH.55EnglishiteK3Na2Ca10Al15(OH)7(PO4)21 · 26H2O
8.DH.60BouazzeriteBi6(Mg,Co)11Fe14(AsO4)18O12(OH)4 · 86H2O
19.14.1CyriloviteNaFe33+(PO4)2(OH)4 · 2H2O
19.14.2KidwelliteNaFe3+9+x(PO4)6(OH)11 · 3H2O (x~1/3)
19.14.6NatrodufréniteNaFe2+Fe53+(PO4)4(OH)6 · 2H2O
19.14.7LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
19.14.8Spheniscidite(NH4)Fe23+(PO4)2(OH) · 2H2O
19.14.9BurangaiteNaFe2+Al5(PO4)4(OH)6 · 2H2O
19.14.11UshkoviteMgFe23+(PO4)2(OH)2 · 8H2O
19.14.14AnapaiteCa2Fe2+(PO4)2 · 4H2O
19.14.15XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
19.14.17MitridatiteCa2Fe33+O2(PO4)3 · 3H2O
19.14.19DelvauxiteCaFe43+(PO4)2(OH)8 · 4-5H2O
19.14.20CollinsiteCa2Mg(PO4)2 · 2H2O
19.14.21SegeleriteCaMgFe3+(PO4)2(OH) · 4H2O
19.14.22KingsmountiteCa4Fe2+Al4(PO4)6(OH)4 · 12H2O
19.14.23VauxiteFe2+Al2(PO4)2(OH)2 · 6H2O
19.14.24MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
19.14.25ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
19.14.26SigloiteFe3+Al2(PO4)2(OH)3 · 7H2O
19.14.27CacoxeniteFe243+AlO6(PO4)17(OH)12 · 75H2O
19.14.28KoninckiteFe3+PO4 · 3H2O
19.14.31SouzaliteMg3Al4(PO4)4(OH)6 · 2H2O
19.14.32GormaniteFe32+Al4(PO4)4(OH)6 · 2H2O

Other Names for Calcioferrite

Name in Other Languages:

Other Information

Other Information:
Readily decomposed by HCl.
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 Calcioferrite

Reference List:
Blum, J.R. (1858): Calcioferrit, eine neue Mineral-Spezies. Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefacten-Kunde, 258 (in German).

Dana, J.D. (1868) System of Mineralogy, 5th. Edition, New York: 578.

Rammelsberg, C.F. (1875) Handbuch der Mineralchemie. second edition: 316.

Larsen, E.S. (1921) The Microscopic Determination of the Nonopaque Minerals, First edition, USGS Bulletin 679: 52.

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. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 976-977.

Mead, C.W. and M.E. Mrose (1968) Solving problems in phosphate mineralogy with the electron probe. U.S. Geological Survey Professional Paper 600-D, D204-D206.

American Mineralogist (1969): 54: 993.

Ankinovich, E.A., S.G. Ankinovich, A.A. Dara, and F.A. Kurmakaeva (1983) Ferrous montgomeryite of the Kara-Tau. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva (Proceedings of the Russian Mineralogical Society), 112, 84-88 (in Russian with English abstract).

Dunn, P.J., W.L. Roberts, T.J. Campbell, and P.B. Leavens (1983) Red montgomeryite and associated minerals from the Tip Top pegmatite with notes on kingsmountite and calcioferrite. Mineralogical Record, 14, 195-197.

Henderson, W.A., Jr. and V. Peisley (1985) Calcioferrite from the Moculta quarry near Angaston, South Australia. Mineralogical Record, 16, 477-480.

B. Lafuente, R. T. Downs, H. Yang and R. A. Jenkins (2014): Calcioferrite with composition (Ca3.94Sr0.06)Mg1.01(Fe2.93Al1.07)(PO4)6(OH)4·12H2O. Acta Crystallogr. E70, i16-i17.

Internet Links for Calcioferrite URL:
Please feel free to link to this page.

Localities for Calcioferrite

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.
  • South Australia
    • Mt Lofty Ranges
      • North Mt Lofty Ranges
        • Barossa Valley
          • Angaston
Henderson, W. A., jr. & Peisley, V. (1985): Calcioferrite from the Moculta quarry near Angaston, South Australia. Mineralogical Record 16, 477-480.
  • Bavaria
    • Upper Palatinate
      • Waidhaus
        • Hagendorf
  • Rhineland-Palatinate
    • Palatinate
      • Grünstadt-Land
Blum, J.R. (1858): Neues Jahrbuch für Mineralogie, Geognosie, Geologie und Petrefacten-Kunde, 258; 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: 977
  • Sardinia
    • Cagliari Province
      • Villaputzu
Mariani P., Scaini G.: "I minerali d'Italia" - Rizzoli, 1978 and A. Del Caldo, C. Del Moro, C.M. Gramaccioli, M. Boscardin M. "Guida ai Minerali" Fabbri ed. Milano, 1981 and De Michele V. (1975) – Guida Mineralogica d’Italia – Ist. Geogr. De Agostini, Novara
  • Catalonia
    • Barcelona
      • Baix Llobregat
Camprubí, A., Costa, F., Melgarejo, J.C., 1994. Mineralizaciones de fosfatos férrico-alumínicos de Gavà (Catalunya): tipología. Boletín Geológico y Minero, v. 105-5, p. 444-453.
          • Bruguers
1.Tritlla, J. (1987).- “Sobre la presencia de dufrenita en las minas de Bruguers (Prov. de Barcelona)”. Mineralogistes de Catalunya, Vol.III, n.8, pp.208-209
        • Sant Feliu de Llobregat
          • Collserola mountain range
            • Santa Creu d'Olorda
Bareche, E. (2005): "Els minerals de Catalunya: segle XX". Grup Mineralògic Català & Institució Catalana d'Historia Natural. Barcelona.
      • Vallès Occidental
        • Montcada i Reixac
Mineralogistes de Catalunya (1997), VII (1): 34-55
  • North Carolina
    • Cleveland Co.
      • Kings Mountain District
JanH.Bernard and Jaroslav Hyrsl,2004,Minerals and their Localities,pg # 106
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