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Ferristrunzite

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Formula:
Fe
3+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
3
· 5H
 
2
O
System:TriclinicColour:Pale yellow to creamy ...
Hardness:4
Member of:Strunzite Group
Name:Named in 1987 by Donald R. Peacor, Pete J. Dunn, William B. Simmons, and Robert A. Ramik for its chemical relationship to strunzite
Polymorph of:Laueite, Stewartite
Isostructural with:Strunzite
This page provides mineralogical data about Ferristrunzite.

Classification of Ferristrunzite

IMA status:Approved 1986
Strunz 8th edition ID:7/D.11-30
Nickel-Strunz 10th (pending) edition ID:8.DC.25

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:42.11.9.3

42 : HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
11 : (AB)3(XO4)2Zq·xH2O
Hey's CIM Ref.:19.13.8

19 : Phosphates
13 : Phosphates of Fe alone
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Type Occurrence of Ferristrunzite

Type Locality:Mont-des-Groseillers, Blaton, Mons, Hainaut Province (Henegouwen; Hennegau), Belgium
General Appearance of Type Material:Tan radiating acicular crystals
Year of Discovery:1986
Geological Setting of type material:Fracture filling in a sedimentary rock
Associated Minerals at type locality:
CacoxeniteCacoxeniteBerauniteStrengite

Occurrences of Ferristrunzite

Geological Setting:Granite pegmatites, sedimentary phosphate nodules.

Physical Properties of Ferristrunzite

Lustre:Sub-Vitreous, Resinous, Waxy, Silky, Dull
Diaphaneity (Transparency):Transparent, Translucent
Colour:Pale yellow to creamy white, tan to very light brown
Streak:White
Hardness (Mohs):4
Tenacity:Brittle
Cleavage:None Observed
Fracture:Splintery
Density (measured):2.38 - 2.50 g/cm3
Density (calculated):2.55 g/cm3

Crystallography of Ferristrunzite

Crystal System:Triclinic
Cell Parameters:a = 10.012Å, b = 9.732Å, c = 7.334Å
α = 90.50°, β = 96.99°, γ = 116.43°
Ratio:a:b:c = 1.029 : 1 : 0.754
Unit Cell Volume:V 633.56 ų (Calculated from Unit Cell)
Z:2
X-Ray Powder Diffraction:
d-spacingIntensity
8.87 (80)
5.34 (100)
4.48 (20)
4.20 (30)
3.442 (30)
3.387 (30)
3.267 (40)

Optical Data of Ferristrunzite

Type:Biaxial (+)
RI values: nα = 1.664 nβ = 1.698 nγ = 1.757
2V:Measured: 77° , Calculated: 78°
Birefringence:0.093
Maximum Birefringence:δ = 0.093

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:High
Dispersion:strong
Optical Extinction:Z^c ~ 17°
Pleochroism:Visible
Comments:X = greenish yellow, Z = brownish yellow

Chemical Properties of Ferristrunzite

Formula:
Fe
3+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
3
· 5H
 
2
O
Simplified for copy/paste:Fe3+Fe3+2(PO4)2(OH)3·5H2O
Essential elements:Fe, H, O, P
All elements listed in formula:Fe, H, O, P

Relationship of Ferristrunzite to other Species

Member of:Strunzite Group
Other Members of Group:

- +
Ferrostrunzite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O
Strunzite
Mn
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O
Common Associates:
BerauniteCacoxeniteCacoxeniteStrengite
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.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
F
 
2
(OH) · 7H
 
2
O
8.DC.50Wavellite
Al
 
3
(PO
 
4
)
 
2
(OH,F)
 
3
· 5H
 
2
O
8.DC.50Allanpringite
Fe
3+
3
(PO
 
4
)
 
2
(OH)
 
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
Related Minerals - Hey's Index Grouping:

- +
19.13.1Barbosalite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
19.13.2Strengite
FePO
 
4
· 2H
 
2
O
19.13.3Phosphosiderite
FePO
 
4
· 2H
 
2
O
19.13.4Dufrénite
Ca
 
0.5
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
6
· 2H
 
2
O
19.13.5Giniite
Fe
2+
 
Fe
3+
4
(PO
 
4
)
 
3
(OH)
 
5
· 2H
 
2
O
19.13.6Whitmoreite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 4H
 
2
O
19.13.7Tinticite
Fe
3+
5.34
(PO
 
4
)
 
3.62
(VO
 
4
)
 
0.38
(OH)
 
4
· 6.7H
 
2
O
19.13.9Ferrostrunzite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O
19.13.10Beraunite
Fe
2+
 
Fe
3+
5
(PO
 
4
)
 
4
(OH)
 
5
· 4H
 
2
O
19.13.11Vivianite
Fe
2+
3
(PO
 
4
)
 
2
· 8H
 
2
O
19.13.12Metavivianite
Fe
2+
 
Fe
3+
2
(PO
 
4
)
 
2
(OH)
 
2
· 6H
 
2
O

Other Names for Ferristrunzite

Synonyms:
IMA1986-023
Other Languages:
German:Ferristrunzit
Spanish:Ferristrunzita

Other Information

Fluorescence in UV light:Not fluorescent in UV
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 Ferristrunzite

Reference List:

- +
American Mineralogist: 74: 502.

Best Localities for Ferristrunzite

Best of Species:Ferristrunzite

Internet Links for Ferristrunzite

Search Engines:
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  • Look for Ferristrunzite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Ferristrunzite details from Handbook of Mineralogy (PDF)
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  • Localities for Ferristrunzite

    The 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.
    (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.
    Belgium
     
    • Hainaut Province (Henegouwen; Hennegau)
      • Mons
        • Blaton
    Peacor, D.R., Dunn, P.J.,Simmons,W.B. and Ramik, R.A. (1987): Ferristrunzite, a new member of the strunzite group, from Blaton, Belgium. Neues Jahrbuch für Mineralogie, Monatshefte 1987, 453-457
    • Namur Province
      • Anhée
    Dillen H., Van Goethem L. (1990), "Ferristrunzite", Bull. Soc. belge Géol., 99(3-4), 399
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Aš (Asch)
    Breiter K., Škoda R., Veselovský F.: Neobvyklý P-, Li- a Sn-bohatý pegmatit z Vernéřova u Aše, Česká republika. Bulletin Mineralogicko-petrografického oddělení Národního muzea v Praze, 2009, roč. 17, č. 1, s. 41-59.
    France
     
    • Midi-Pyrénées
      • Tarn
        • Castelnau-de-Brassac
          • Fumade
    Favreau, G., Bernadi, G. & Gayraud, L. (2013): Fumade (Tarn): descriptions complémentaires des espèces minérales. Le Cahier des Micromonteurs, 119, 3-25.
    Germany
     
    • Bavaria
      • Upper Palatinate
        • Oberpfälzer Wald
          • Vohenstrauß
            • Waidhaus
    Wittern: "Mineralfundorte in Deutschland", 2001
    • North Rhine-Westphalia
      • Wuppertal
        • Aprath castle
    Emser Hefte 1988(4), 35-40
    • Saxony
      • Oberlausitz
        • Görlitz
          • Neißeaue
    Witzke, T. & Giesler, T. (2013): Seltene Phosphate und Vanadate von Emmerichswalde bei Görlitz/Sachsen. Mineralien-Welt 24 (2), 40-55
    • Thuringia
      • Harz
        • Neustadt/Harz
          • Lange Tal
            • Neustadt dam
    Gröbner, J., Hajek, W., Junker, R. & Nikoleizig, J. (2011): Neue Mineralschätze des Harzes. Papierflieger Verlag GmbH, Clausthal-Zellerfeld, Germany, 127 pp.
    UK
     
    • England
      • Cornwall
        • St Agnes District
          • Perranzabuloe
            • Perran Iron Lode (Great Perran Iron Lode)
    No reference listed
    USA
     
    • Wisconsin
      • Rusk Co.
        • Ladysmith
    www.uwrf.edu/~wc01/ferristrunzite.htm
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