Phosphoferrite
A valid IMA mineral species - grandfathered
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About Phosphoferrite
Formula:
(Fe2+,Mn2+)3(PO4)2 · 3H2O
Colour:
Colourless, pale green, reddish brown (altered); colourless to faintly tinted green in transmitted light.
Lustre:
Vitreous, Resinous
Hardness:
3 - 3½
Specific Gravity:
3 - 3.2
Crystal System:
Orthorhombic
Member of:
Name:
In allusion to the composition, containing PHOSPHOrus and iron (Latin = FERRum).
Unique Identifiers
Mindat ID:
3199
Long-form identifier:
mindat:1:1:3199:4
GUID
(UUID V4):
(UUID V4):
8880a2d0-8ab8-4452-9738-7b9328ff4119
IMA Classification of Phosphoferrite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Fe2+3(PO4)2 · 3H2O
Classification of Phosphoferrite
8.CC.05
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
C : With only medium-sized cations, RO4:H2O = 1:1.5
40.3.2.1
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
40 : HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
3 : A3(XO4)2·xH2O
19.12.19
19 : Phosphates
12 : Phosphates of Mn
19 : Phosphates
12 : Phosphates of Mn
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Phf | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Phosphoferrite
Vitreous, Resinous
Transparency:
Transparent, Translucent
Comment:
Lustre ranges to sub-resinous from vitreous.
Colour:
Colourless, pale green, reddish brown (altered); colourless to faintly tinted green in transmitted light.
Hardness:
3 - 3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
On {010}, poor.
On {010}, poor.
Fracture:
Irregular/Uneven
Density:
3 - 3.2 g/cm3 (Measured)
Optical Data of Phosphoferrite
Type:
Biaxial (+)
RI values:
nα = 1.663 - 1.672 nβ = 1.674 - 1.680 nγ = 1.699 - 1.700
2V:
Measured: 68° , Calculated: 66°
Max Birefringence:
δ = 0.036
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v strong
Optical Extinction:
Parallel. X = a; Y = b; Z = c.
Chemistry of Phosphoferrite
Mindat Formula:
(Fe2+,Mn2+)3(PO4)2 · 3H2O
Crystallography of Phosphoferrite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pmna
Cell Parameters:
a = 9.41 Å, b = 10.02 Å, c = 8.66 Å
Ratio:
a:b:c = 0.939 : 1 : 0.864
Unit Cell V:
816.54 ų (Calculated from Unit Cell)
Morphology:
Crystals octahedral with large {111}, or tabular {010}. The crystals frequently grow in parallel groupings. Massive, granular; coarsely fibrous.
Crystal Structure
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Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0009153 | Phosphoferrite | Eversheim P, Kleber W (1953) Morphologie und struktur des reddingits, P2O5*3FeO*3H2O Acta Crystallographica 6 215-216 | 1953 | 0 | 293 | ||
0012680 | Phosphoferrite | Moore P B, Araki T (1976) A mixed-valence solid-solution series: Crystal structures of phosphoferrite, Fe3(H2O)3[PO4]2, and kryzhanovskite, Fe3(OH)3[PO4]2 Inorganic Chemistry 15 316-321 | 1976 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.18 Å | (100) |
2.724 Å | (80) |
4.25 Å | (70) |
2.639 Å | (70) |
2.408 Å | (70) |
2.222 Å | (70) |
1.615 Å | (70) |
Comments:
Hagendorf, Germany.
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites | |
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Phosphoferrite
Co-Type Localities:
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 150230.
Geological Setting of Type Material:
Pegmatite
Associated Minerals at Type Locality:
Synonyms of Phosphoferrite
Other Language Names for Phosphoferrite
Relationship of Phosphoferrite to other Species
Member of:
Other Members of this group:
Correianevesite | Fe2+Mn2+2(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) |
Garyansellite | (Mg,Fe)3(PO4)2(OH,O) · 1.5H2O | Orth. mmm (2/m 2/m 2/m) |
Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 | Orth. mmm (2/m 2/m 2/m) |
Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O | Orth. mmm (2/m 2/m 2/m) |
Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O | Orth. mmm (2/m 2/m 2/m) : Pmna |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
18 photos of Phosphoferrite associated with Ludlamite | Fe2+3(PO4)2 · 4H2O |
6 photos of Phosphoferrite associated with Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
2 photos of Phosphoferrite associated with Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 |
2 photos of Phosphoferrite associated with Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 |
2 photos of Phosphoferrite associated with Hureaulite | Mn2+5(PO3OH)2(PO4)2 · 4H2O |
1 photo of Phosphoferrite associated with Triplite | Mn2+2(PO4)F |
1 photo of Phosphoferrite associated with Graftonite-(Ca) | CaFe2+2(PO4)2 |
1 photo of Phosphoferrite associated with Fluorapatite | Ca5(PO4)3F |
Related Minerals - Strunz-mindat Grouping
8.CC. | Correianevesite | Fe2+Mn2+2(PO4)2 · 3H2O |
8.CC.05 | Garyansellite | (Mg,Fe)3(PO4)2(OH,O) · 1.5H2O |
8.CC.05 | Kryzhanovskite | (Fe3+,Mn2+)3(PO4)2(OH,H2O)3 |
8.CC.05 | Landesite | Mn2+3-xFe3+x(PO4)2(OH)x · (3-x)H2O |
8.CC.05 | Reddingite | (Mn2+,Fe2+)3(PO4)2 · 3H2O |
8.CC.10 | Kaatialaite | Fe(H2AsO4)3 · 5H2O |
8.CC.15 | Leogangite | Cu10(AsO4)4(SO4)(OH)6 · 8H2O |
Other Information
Notes:
Soluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Phosphoferrite
mindat.org URL:
https://www.mindat.org/min-3199.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Phosphoferrite
Localities for Phosphoferrite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and 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 (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Argentina | |
| Roda-Robles et al. (2012) |
Australia | |
| |
| Eagle et al. (2015) |
| Eagle et al. (2015) |
Eagle et al. (2015) | |
Brazil | |
| Cassedanne et al. (1982) |
| King et al. (1989) |
| Cassedanne et al. (1981) |
China | |
| Rao et al. (2017) |
France | |
| FONTAN F (1976) |
| Inventaire Minéralogique de la France ... |
Germany (TL) | |
| Wittern (2001) |
| DILL et al. (2008) +1 other reference |
| Dill et al. (2011) |
Laubmann +3 other references | |
Min Mag 43 (1980) +1 other reference | |
| Dana 7:II:770. |
Italy | |
| VIGNOLA et al. (2007) |
| Dana 7:II:771. |
| Vignola et al. (2018) |
Poland | |
| Pieczka A. |
| Włodek et al. (2015) |
Łodziński M. & Sitarz M. 2008: Chemical and Spectroscopic Characterization of Some Phosphates Accessory Minerals from Pegmatites of the Sowie Mts (Owles Mts) | |
Pieczka et al. (2015) +1 other reference | |
Portugal | |
| Martins et al. (2011) |
| Neiva et al. (2000) |
| |
| Pedro Alves collection. Characterized ... |
USA | |
| Mineral News (1995) +1 other reference |
| Moore (1973) |
| Campbell et al. (1985) |
| Mineralogical Record: 17: 245 +2 other references |
| Campbell et al. (1985) |
| Smith et al. (2000) |
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Dan Patch Mine, Keystone, Keystone Mining District, Pennington County, South Dakota, USA