Bederite (original) (raw)
A valid IMA mineral species
About BederiteHide
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Formula:
Ca2(Mn2+)4(Fe3+)2(PO4)6 · 2H2O
Formula simplifies the crystal-chemical features; the Na site in other wicksite-group minerals is vacant in bederite.
Colour:
very dark brown to black
Crystal System:
Orthorhombic
Name:
Named in 1999 by M. A. Galliski, M. A. Cooper, Frank C. Hawthorne, and Petr Černý in honor of Roberto Beder [February 16, 1888 Zurich, Switzerland - November 19, 1930 Córdoba, Argentina] in recognition of his major contributions to the development of mineralogy in Argentina. assistant at Museum of Natural History of La Plata in 1912 and soon was Professor of Mineralogy at University of Córdoba (1914).
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:6821:1
d7ab8786-6e68-4d04-8b22-641cb7d2187a
IMA Classification of BederiteHide
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IMA Formula:
Ca2Mn2+4Fe3+2(PO4)6 · 2H2O
Type description reference:
Galliski, Miguel A., Cooper, Mark A., Hawthorne, Frank C., Černý, Petr (1999) Bederite, a new pegmatite phosphate mineral from Nevados de Palermo, Argentina; description and crystal structure. American Mineralogist, 84 (10) 1674-1679 doi:10.2138/am-1999-1022
Classification of BederiteHide
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8.CF.05
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
F : With large and medium-sized cations, RO4:H2O > 1:1
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Bdr | 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 BederiteHide
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Colour:
very dark brown to black
Cleavage:
Distinct/Good
Parallel to {100}
Fracture:
Irregular/Uneven
Density:
3.48(1) g/cm3 (Measured) 3.50 g/cm3 (Calculated)
Optical Data of BederiteHide
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RI values:
_n_α = 1.729(3) _n_β = 1.738(3) _n_γ = 1.741(3)
2V:
Measured: 54° , Calculated: 60°
δ = 0.012
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Comments:
X = Y = olive green, Z = brown with X = Y > Z and X = a, Y = c, Z = b.
Chemistry of BederiteHide
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Mindat Formula:
Ca2(Mn2+)4(Fe3+)2(PO4)6 · 2H2O
Formula simplifies the crystal-chemical features; the Na site in other wicksite-group minerals is vacant in bederite.
Crystallography of BederiteHide
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Crystal System:
Orthorhombic
Class (H-M):
m m m _(_2/_m_2/_m_2/m ) - Dipyramidal
Cell Parameters:
a = 12.559(2) Å, b = 12.834(1) Å, c = 11.714(2) Å
Ratio:
a:b:c = 0.979 : 1 : 0.913
Unit Cell V:
1,888.09 ų (Calculated from Unit Cell)
Twinning:
Small optical domains resemble “tartan” twinning in microcline.
Comment:
Space Group: Pcab
Crystal StructureHide
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0002333 | Bederite | Galliski M A, Cooper M A, Hawthorne F C, Cerny P (1999) Bederite, a new pegmatite phosphate mineral from Nevados de Palermo, Argentina: Description and crystal structure American Mineralogist 84 1674-1679 |  |
1999 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder DiffractionHide
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Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.768 Å | (100) |
| 2.927 Å | (78) |
| 3.006 Å | (67) |
| 2.814 Å | (35) |
| 2.110 Å | (33) |
Geological EnvironmentHide
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Type Occurrence of BederiteHide
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General Appearance of Type Material:
Massive ellipsoidal nodules up to ~5 cm in diameter.
Place of Conservation of Type Material:
Canadian Museum of Nature, Ottawa (CMNMC 81556) and in the Museo Prof. M. Tellechea, CRICYT, Mendoza (no. 8553).
Geological Setting of Type Material:
Rare-element pegmatite of the beryl type, beryl-columbite-phosphate subtype.
Associated Minerals at Type Locality:
Reference:
Galliski, M.A., Cooper, M.A., Hawthorne, F.C., Černý, P. (1999) Bederite, a new pegmatite mineral from Nevados de Palermo, Argentina: description and crystal structure. American Mineralogist: 84: 1674-1679.
Synonyms of BederiteHide
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Other Language Names for BederiteHide
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Relationship of Bederite to other SpeciesHide
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Other Members of this group:
| Grischunite | NaCa2Mn2+5Fe3+(AsO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
|---|---|---|
| Liraite | NaCa2Mn2+2[Fe3+Fe2+]Mn2+2(PO4)6(H2O)2 | Orth. m _m_2 |
| Maneckiite | (Na◻)Ca2Fe2+2(Fe3+Mg)Mn2(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| Tassieite | (Na,◻)Ca2(Mg,Fe2+,Fe3+)2(Fe2+,Mg)2(Fe3+,Mg)2(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| Wicksite | NaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
Related Minerals - Strunz-mindat GroupingHide
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| 8.CF. | Naalasite | NaAl(AsO3OH)2 · H2O | Trig. 32 : _R_32 |
|---|---|---|---|
| 8.CF. | Falsterite | Ca2MgMn2+2Fe2+2Fe3+2Zn4(PO4)8(OH)4(H2O)14 | Mon. 2/m : _P_21/b |
| 8.CF. | Ferraioloite | MgMn2+4(Fe2+0.5Al3+0.5)4Zn4(PO4)8(OH)4(H2O)20 | Mon. |
| 8.CF. | Espadaite | Na4Ca3Mg2[AsO3(OH)]2[AsO2(OH)2]10 · 7H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : C c c a |
| 8.CF. | Liraite | NaCa2Mn2+2[Fe3+Fe2+]Mn2+2(PO4)6(H2O)2 | Orth. m _m_2 |
| 8.CF. | Nafeasite | Na3Fe3+3(AsO3OH)6 · 3H2O | Mon. 2 : _B_2 |
| 8.CF.05 | Grischunite | NaCa2Mn2+5Fe3+(AsO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) |
| 8.CF.05 | Wicksite | NaCa2(Fe2+,Mn2+)4MgFe3+(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.CF.05 | Tassieite | (Na,◻)Ca2(Mg,Fe2+,Fe3+)2(Fe2+,Mg)2(Fe3+,Mg)2(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.CF.05 | Maneckiite | (Na◻)Ca2Fe2+2(Fe3+Mg)Mn2(PO4)6 · 2H2O | Orth. m m m _(_2/_m_2/_m_2/m ) : P b c a |
| 8.CF.10 | Haigerachite | KFe3+3(PO3OH)2[PO2(OH)2]6 · 4H2O | Mon. 2/m : _B_2/b |
| 8.CF.10 | Yazganite | NaFe3+2(Mg,Mn2+)(AsO4)3 · H2O | Mon. 2/m : _B_2/b |
| 8.CF.15 | Currierite | Na4Ca3MgAl4(AsO3OH)12 · 9H2O | Hex. 622 : _P_622 |
| 8.CF.20 | Ríosecoite | Ca2Mg(AsO3OH)3(H2O)2 | Tric. 1 : _P_1 |
Fluorescence of BederiteHide
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Other InformationHide
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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 BederiteHide
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References for BederiteHide
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Reference List:
Galliski, Miguel A., Cooper, Mark A., Hawthorne, Frank C., Černý, Petr (1999) Bederite, a new pegmatite phosphate mineral from Nevados de Palermo, Argentina; description and crystal structure. American Mineralogist, 84 (10) 1674-1679 doi:10.2138/am-1999-1022
Localities for BederiteHide
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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
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- 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.
| Argentina | |
|---|---|
| Salta Province La Poma Department ⓘ El Quemado mining district | Galliski (1981) |
| ⓘ El Peñón deposit (TL) | Galliski et al. (1999) +1 other reference |
| Morocco | |
| Drâa-Tafilalet Region Ouarzazate Province Amerzgane Cercle Ouisselsate Caïdat ⓘ Angarf-South pegmatite | Kampf et al. (2012) |