Phosphoferrite Mineral Data

Phosphoferrite Mineral Data +

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General Phosphoferrite Information

Chemical Formula:

(Fe++,Mn)3(PO4)2·3(H2O)

Composition:

Molecular Weight = 410.85 gm

Manganese 10.03 % Mn 12.95 % MnO

Iron 30.58 % Fe 39.35 % FeO

Phosphorus 15.08 % P 34.55 % P₂O₅

Hydrogen 1.47 % H 13.15 % H₂O

Oxygen 42.84 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

3(Fe²⁺_0.75)3(Mn²⁺_0.25)(PO₄)₂·3(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1926

Locality:

Hagendorf Sud, near Pleystein, Oberpfalz, Bavaria, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for the compositoin, PHOSPHate and FERRous Iron.

Synonym:

ICSD 302

PDF 9-479

Phosphoferrite Image

Images:

Phosphoferrite

Comments: Translucent, brown crystal of phosphoferrite on matrix.
Location: Big Chief mine, Keystone, Pennington County, South Dakota, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Phosphoferrite Crystallography

Axial Ratios:

a:b:c =0.9391:1:0.8642

Cell Dimensions:

a = 9.41, b = 10.02, c = 8.66, Z = 4; V = 816.54 Den(Calc)= 3.34

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmna

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.18(1), 2.724(0.8), 4.25(0.7),

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Forms: [ 1 0 1] [ 0 2 2] [ 1 1 2] [ 0 1 0] [ 1 1 1] [ 2 1 2] [ 1 2 2] [ 1 0 0] [ 1 0 2] [ 0 0 1]

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Physical Properties of Phosphoferrite

Cleavage:

[010] Indistinct

Color:

Colorless, Light green, Dark reddish brown, Reddish brown.

Density:

3.29

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Octahedral Crystals - Occurs as octahedral shaped crystals.

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Phosphoferrite

Gladstone-Dale:

CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2048,KPDmeas= 0.2079,KC= 0.2074

Optical Data:

Biaxial (+), a=1.672, b=1.68, g=1.7, bire=0.0280, 2V(Calc)=66, 2V(Meas)=68. Dispersion r > v distinct.

Calculated Properties of Phosphoferrite

Electron Density:

r_electron=3.22 gm/cc
note: r_{Phosphoferrite}=3.29 gm/cc.

Fermion Index

Fermion Index = 0.00669
Boson Index = 0.99331

Photoelectric:

PE_{Phosphoferrite}= 12.37 barns/electron
U=PE_{Phosphoferrite} x r_electron= 39.86 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Phosphoferrite is Not Radioactive

Phosphoferrite Classification

Dana Class:

40.3.2.1 (40)Hydrated Phosphates, etc

(40.3)where (A++)3 (XO4)2 · x(H2O)

(40.3.2)Dana Group

40.3.2.1 Phosphoferrite (Fe,Mn)3(PO4)2·3(H2O) Pmna 2/m 2/m 2/m

40.3.2.2 Kryzhanovskite MnFe2(PO4)2(OH)2·(H2O) Pbna 2/m 2/m 2/m

40.3.2.3 Reddingite Mn3(PO4)2·3(H2O) Pbna 2/m 2/m 2/m

40.3.2.4 Landesite (Mn,Mg)9Fe3(PO4)8(OH)3·9(H2O) Pmna 2/m 2/m 2/m

40.3.2.5 Garyansellite (Mg,Fe)3(PO4)2(OH,O)·1,5(H2O) Pbna 2/m 2/m 2/m

Strunz Class:

VII/C.08-10 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.08 - Phosphoferrite - Kryzhanovskite series

VII/C.08-10 Phosphoferrite (Fe,Mn)3(PO4)2·3(H2O) Pmna 2/m 2/m 2/m

VII/C.08-20 Reddingite Mn3(PO4)2·3(H2O) Pbna 2/m 2/m 2/m

VII/C.08-30 Garyansellite (Mg,Fe)3(PO4)2(OH,O)·1,5(H2O) Pbna 2/m 2/m 2/m

VII/C.08-40 Kryzhanovskite MnFe2(PO4)2(OH)2·(H2O) Pbna 2/m 2/m 2/m

Other Phosphoferrite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Phosphoferrite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Phosphoferrite

(Fe++,Mn)3(PO4)2·3(H2O)
Dana No: 40.3.2.1 Strunz No: VII/C.08-10
Locality:

Notes: