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Allanpringite

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Mark Mine, Essershausen, Weilburg, Wetzlar, Hesse, Germany
© Richard Bayerl

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Formula:
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
System:MonoclinicColour:Pale brown-yellow
Hardness:3
Name:
For Dr. Allan Pring, eminent Australian mineralogist and Curator at the South Australian Museum, Adelaide.


The monoclinic-pseudoorthorhombic Fe3+-analogue of the orthorhombic Al-phosphate Wavellite.

Classification of Allanpringite

IMA status:Approved 2004
Strunz 8th edition ID:7/D.11-107
Strunz 9th edition ID:8.DC.50
Nickel-Strunz 10th (pending) edition ID:8.DC.50

8 : PHOSPHATES, ARSENATES, VANADATES
D : Phosphates, etc. with additional anions, with H2O
C : With only medium-sized cations, (OH, etc.):RO4 = 1:1 and < 2:1
Dana 8th edition ID:42.10.2.2

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
10 : A3(XO4)2Zq·xH2O
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Type Occurrence of Allanpringite

Type Locality:Mark Mine, Essershausen, Weilburg, Wetzlar, Hesse, Germany
General Appearance of Type Material:Acicular, invariably twinned (by nonmerohedry) crystals, which are always intergrown to form bundles of subparallel individuals
Geological Setting of type material:With other iron phosphates in the dump of an abandoned iron mine
Associated Minerals at type locality:
StrengiteOxiberauniteCryptomelaneCacoxenite

Physical Properties of Allanpringite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Pale brown-yellow
Streak:White with a pale yellowish tint
Hardness (Mohs):3
Tenacity:Brittle
Cleavage:Perfect
parallel to the morphological elongation; good parallel to {010}
Fracture:Irregular/Uneven
Density (measured):2.54(2) g/cm3
Density (calculated):2.583 g/cm3
Comment:Calculated density refers to the empirical formula

Crystallography of Allanpringite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/m {P1 1 21/m} {P21/m} {P1 21/m 1}
Cell Parameters:a = 9.777(3) Å, b = 7.358(2) Å, c = 17.83(5) Å
β = 92.19(4)°
Ratio:a:b:c = 1.329 : 1 : 2.423
Unit Cell Volume:V 1281.7 ų
Z:4
Morphology:Acicular crystals, elongated along [010], to 1.5 mm, in bundles, to 2 mm, of subparallel individuals
Comment:Cell parameter from single-crystal data
X-Ray Powder Diffraction:
d-spacingIntensity
8.90 (100)
8.41 (60)
5.870 (50)
3.600 (50)
3.231 (80)

Optical Data of Allanpringite

Type:Biaxial (+)
RI values: nα = 1.662(5) nβ = 1.675(5) nγ = 1.747(5)
2V:Calculated: 48°
Maximum Birefringence:δ = 0.085

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:not visible
Pleochroism:Strong
Comments:X colourless, Y colourless, Z dark yellow; absorption Z ≫ X ∼ Y; orientation XYZ = **b (pseudoorthorhombic)

Chemical Properties of Allanpringite

Formula:
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
Essential elements:Fe, H, O, P
All elements listed in formula:Fe, H, O, P
Analytical Data:Results from electron microprobe analysis
Empirical formula based on 16 oxygen atoms per formula unit
Fe2O3      (47.84)
Al2O3       (0.34)
Mn2O3       (0.04)
CuO         (0.08)
P2O5       (28.56)
F           (0.02)
H2O        (23.49) (calculated)
less O = F  (0.01)

total      100.36 wt.-%
Empirical Formula:
(Fe
 
2.98
Al
 
0.03
)(PO
 
4
)
 
2
{(OH)
 
3.02
F
 
0.01
} · 4.97H
 
2
O

Relationship of Allanpringite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
8.DC.05Nissonite
Cu
 
2
Mg
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 5H
 
2
O
8.DC.07Euchroite
Cu
 
2
(AsO
 
4
)(OH) · 3H
 
2
O
8.DC.10Legrandite
Zn
 
2
(AsO
 
4
)(OH) · H
 
2
O
8.DC.12Strashimirite
Cu
 
8
(AsO
 
4
)
 
4
(OH)
 
4
 · 5H
 
2
O
8.DC.15Arthurite
CuFe
3+
2
(AsO
 
4
,PO
 
4
,SO
 
4
)
 
2
(OH,O)
 
2
 · 4H
 
2
O
8.DC.15Earlshannonite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Ojuelaite
ZnFe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Whitmoreite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Cobaltarthurite
(Co,Mg)Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Bendadaite
Fe
2+
 
Fe
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15Kunatite
CuFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15UKI-2006-(PO:FeHZn)
ZnFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.15UKI-2006-(PO:AlCuFeH)
Fe
2+
 
Al
 
3
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.17Kleemanite
ZnAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 3H
 
2
O
8.DC.20Bermanite
Mn
2+
 
Mn
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.20Coralloite
Mn
2+
 
Mn
3+
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 4H
 
2
O
8.DC.22Kovdorskite
Mg
 
2
(PO
 
4
)(OH) · 3H
 
2
O
8.DC.25Ferristrunzite
Fe
3+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
3
 · 5H
 
2
O
8.DC.25Ferrostrunzite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.25Metavauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.25Metavivianite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.25Strunzite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.27Beraunite
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
5
 · 4H
 
2
O
8.DC.30Gordonite
MgAl
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Laueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Mangangordonite
Mn
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Paravauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Pseudolaueite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Sigloite
Fe
3+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
3
 · 7H
 
2
O
8.DC.30Stewartite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Ushkovite
MgFe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Ferrolaueite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Kastningite
(Mn
2+
 
,Fe
2+
 
,Mg)Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Maghrebite
MgAl
 
2
(AsO
 
4
)
 
2
(OH)
 
2
 · 8H
 
2
O
8.DC.30Nordgauite
MnAl
 
2
(PO
 
4
)
 
2
(F,OH)
 
2
 · 5H
 
2
O
8.DC.32Tinticite
Fe
3+
5.34
(PO
 
4
)
 
3.62
(VO
 
4
)
 
0.38
(OH)
 
4
 · 6.7H
 
2
O
8.DC.35Vauxite
Fe
2+
 
Al
 
2
(PO
 
4
)
 
2
(OH)
 
2
 · 6H
 
2
O
8.DC.37Vantasselite
Al
 
4
(PO
 
4
)
 
3
(OH)
 
3
 · 9H
 
2
O
8.DC.40Cacoxenite
Fe
3+
24
Al(PO
 
4
)
 
17
O
 
6
(OH)
 
12
 · 17H
 
2
O
8.DC.45Gormanite
(Fe
2+
 
,Mg)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DC.45Souzalite
(Mg,Fe
2+
 
)
 
3
(Al,Fe
3+
 
)
 
4
(PO
 
4
)
 
4
(OH)
 
6
 · 2H
 
2
O
8.DC.47Kingite
Al
 
3
(PO
 
4
)
 
2
(OH)
 
3
 · 9H
 
2
O
8.DC.50Wavellite
Al
 
3
(PO
 
4
)
 
2
(OH,F)
 
3
 · 5H
 
2
O
8.DC.52Kribergite
Al
 
5
(PO
 
4
)
 
3
(SO
 
4
)(OH)
 
4
 · 4H
 
2
O
8.DC.55Mapimite
Zn
 
2
Fe
3+
3
(AsO
 
4
)
 
3
(OH)
 
4
 · 10H
 
2
O
8.DC.57Ogdensburgite
Ca
 
2
Fe
3+
4
(Zn,Mn
2+
 
)(AsO
 
4
)
 
4
(OH)
 
6
 · 6H
 
2
O
8.DC.60Nevadaite
(Cu
2+
 
,Al,V
3+
 
)
 
6
Al
 
8
(PO
 
4
)
 
8
F
 
8
(OH)
 
2
 · 22H
 
2
O
8.DC.60Cloncurryite
(Cu,VO)Al
 
2
(PO
 
4
)
 
2
(F,OH)
 
2
 · 4.5-5H
 
2
O

Other Names for Allanpringite

Synonyms:
AllanpringitaIMA2004-050
Other Languages:
German:Allanpringit

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Allanpringite

Reference List:

- +
U. Kolitsch, H.-J. Bernhardt, C. L. Lengauer, G. Blaß and E. Tillmanns (2006): Allanpringite, Fe3(PO4)2(OH)3·5H2O, a new ferric iron phosphate from Germany, and its close relation to wavellite. European Journal of Mineralogy, 18, 793-801.

Internet Links for Allanpringite

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    • Localities for Allanpringite

    Hide Locality List
    (TL) indicates type locality. ? 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.
    Germany
     
    • Hesse
      • Wetzlar
        • Weilburg
          • Essershausen
    		U. Kolitsch, H.-J. Bernhardt, C. L. Lengauer, G. Blaß and E. Tillmanns (2006): Allanpringite, Fe3(PO4)2(OH)3·5H2O, a new ferric iron phosphate from Germany, and its close relation to wavellite. European Journal of Mineralogy, 18, 793-801.
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