Allanpringite Mineral Data

General Allanpringite Information

Chemical Formula:

Fe3(PO4)2(OH)3•5H2O

Composition:

Molecular Weight = 498.07 gm

Aluminum 0.16 % Al 0.31 % Al₂O₃

Iron 33.41 % Fe 47.77 % Fe₂O₃

Phosphorus 12.44 % P 28.50 % P₂O₅

Hydrogen 2.62 % H 23.44 % H₂O

Oxygen 51.36 % O

______ ______

100.00 % 100.02 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_2.98Al_0.03(PO₄)₂(OH)_3.02•4.97(H₂O)

Environment:

Secondary mineral on dump of the abandoned mine. Wavellite group.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Grube Mark near Essershausen, Taunus, Hesse, Germany. Link to MinDat.org Location Data.

Name Origin:

Named for Allan Pring, eminent Australian mineralogist.

Synonym:

IMA2004-050

Allanpringite Image

Images:

Allanpringite

Comments: Yellow crystals of allanpringite with cacoxenite and beraunite.
Location: Grube Mark, Essershausen, Weilburg, Taunus, Gerrmany. Scale: Picture size 1 cm.
© Diederik Visser

Allanpringite Crystallography

Axial Ratios:

a:b:c =1.3287:1:2.4232

Cell Dimensions:

a = 9.777, b = 7.358, c = 17.83, Z = 4; beta = 92.19° V = 1,281.74 Den(Calc)= 2.58

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/n pseudo-ortho

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

By Intensity(I/I_o): 8.9(1), 3.231(0.8), 8.41(0.6),3.6(0.5), 5.87(0.5), 3.357(0.4), 4.873(0.3), 2.177(0.2),

Physical Properties of Allanpringite

Cleavage:

{hk0} Perfect, {010} Good

Color:

Pale brownish yellow.

Density:

2.54

Diaphaneity:

Translucent to transparent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

pale yellowish white

Optical Properties of Allanpringite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.048 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2693,KPDmeas= 0.2735,KC= 0.283
Ncalc = 1.72 - 1.73

Optical Data:

Biaxial (+), a=1.662, b=1.675, g=1.747, bire=0.0850

Calculated Properties of Allanpringite

Electron Density:

Bulk Density (Electron Density)=2.54 gm/cc
note: Specific Gravity of Allanpringite =2.54 gm/cc.

Fermion Index:

Fermion Index = 0.0073341424
Boson Index = 0.9926658576

Photoelectric:

PE_{Allanpringite}= 10.42 barns/electron
U=PE_{Allanpringite} x rElectron Density= 26.43 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Allanpringite is Not Radioactive

Allanpringite Classification

Dana Class:

42.10.02.02 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.10)where (AB)3 (XO4)2 Zq ï¿½ x(H2O)

(42.10.02)Wavellite Group

42.10.02.01 Wavellite Al3(PO4)2(OH,F)3•5(H2O) Pcmn 2/m 2/m 2/m

42.10.02.02 Allanpringite! Fe3(PO4)2(OH)3•5H2O P 2₁/n pseudo-ortho 2/m

Strunz Class:

08.DC.50 08 - PHOSPHATES, ARSENATES, VANADATES

08.D - Phosphates, etc

08.DC -With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1

08.DC.50 Wavellite Al3(PO4)2(OH,F)3•5(H2O) Pcmn 2/m 2/m 2/m

08.DC.50 Allanpringite! Fe3(PO4)2(OH)3•5H2O P 2₁/n pseudo-ortho 2/m

Other Allanpringite Information

References:

NAME( EurJMin, v18:793) PHYS. PROP.(EurJMin, v18:793) OPTIC PROP.(EurJMin, v18:793)

See Also:

Links to other databases for Allanpringite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Allanpringite Specimen Label here :

Allanpringite

Fe3(PO4)2(OH)3•5H2O
Dana No: 42.10.02.02 Strunz No: 08.DC.50
Locality:

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