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Ferristrunzite

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Formula:
Fe3+Fe23+(PO4)2(OH)3 · 5H2O
System:
Triclinic
Colour:
Pale yellow to creamy ...
Hardness:
4
Member of:
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:
Isostructural with:
This page provides mineralogical data about Ferristrunzite.

Classification of Ferristrunzite

Approved 1986
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
42.11.9.3

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

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

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:

Occurrences of Ferristrunzite

Geological Setting:
Granite pegmatites, sedimentary phosphate nodules.

Physical Properties of Ferristrunzite

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:
2.38 - 2.50 g/cm3 (Measured)    2.55 g/cm3 (Calculated)

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
Z:
2
X-Ray Powder Diffraction Data:
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
Max Birefringence:
δ = 0.093
Image 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:
Fe3+Fe23+(PO4)2(OH)3 · 5H2O
Essential elements:
All elements listed in formula:

Relationship of Ferristrunzite to other Species

Member of:
Other Members of Group:
FerrostrunziteFe2+Fe23+(PO4)2(OH)2 · 6H2O
StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.05NissoniteCu2Mg2(PO4)2(OH)2 · 5H2O
8.DC.07EuchroiteCu2(AsO4)(OH) · 3H2O
8.DC.10LegranditeZn2(AsO4)(OH) · H2O
8.DC.12StrashimiriteCu8(AsO4)4(OH)4 · 5H2O
8.DC.15ArthuriteCuFe23+(AsO4)2(OH)2 · 4H2O
8.DC.15EarlshannoniteMn2+Fe23+(PO4)2(OH)2 · 4H2O
8.DC.15OjuelaiteZnFe23+(AsO4)2(OH)2 · 4H2O
8.DC.15WhitmoreiteFe2+Fe23+(PO4)2(OH)2 · 4H2O
8.DC.15Cobaltarthurite(Co,Mg)Fe23+(AsO4)2(OH)2 · 4H2O
8.DC.15BendadaiteFe2+Fe23+(AsO4)2(OH)2 · 4H2O
8.DC.15KunatiteCuFe23+(PO4)2(OH)2 · 4H2O
8.DC.15UKI-2006-(PO:FeHZn)ZnFe23+(PO4)2(OH)2 · 4H2O
8.DC.15UKI-2006-(PO:AlCuFeH)Fe2+Al3(PO4)2(OH)2 · 4H2O
8.DC.17KleemaniteZnAl2(PO4)2(OH)2 · 3H2O
8.DC.20BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
8.DC.20CoralloiteMn2+Mn23+(AsO4)2(OH)2 · 4H2O
8.DC.22KovdorskiteMg2(PO4)(OH) · 3H2O
8.DC.25FerrostrunziteFe2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.25MetavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
8.DC.25MetavivianiteFe2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.25StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
8.DC.27BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
8.DC.30GordoniteMgAl2(PO4)2(OH)2 · 8H2O
8.DC.30LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30MangangordoniteMn2+Al2(PO4)2(OH)2 · 8H2O
8.DC.30ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
8.DC.30PseudolaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30SigloiteFe3+Al2(PO4)2(OH)3 · 7H2O
8.DC.30StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30UshkoviteMgFe23+(PO4)2(OH)2 · 8H2O
8.DC.30FerrolaueiteFe2+Fe23+(PO4)2(OH)2 · 8H2O
8.DC.30Kastningite(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2 · 8H2O
8.DC.30MaghrebiteMgAl2(AsO4)2(OH)2 · 8H2O
8.DC.30NordgauiteMnAl2(PO4)2(F,OH)2 · 5H2O
8.DC.32TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2O
8.DC.35VauxiteFe2+Al2(PO4)2(OH)2 · 6H2O
8.DC.37VantasseliteAl4(PO4)3(OH)3 · 9H2O
8.DC.40CacoxeniteFe243+Al(PO4)17O6(OH)12 · 17H2O
8.DC.45Gormanite(Fe2+,Mg)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
8.DC.45Souzalite(Mg,Fe2+)3(Al,Fe3+)4(PO4)4(OH)6 · 2H2O
8.DC.47KingiteAl3(PO4)2F2(OH) · 7H2O
8.DC.50WavelliteAl3(PO4)2(OH,F)3 · 5H2O
8.DC.50AllanpringiteFe33+(PO4)2(OH)3 · 5H2O
8.DC.52KribergiteAl5(PO4)3(SO4)(OH)4 · 4H2O
8.DC.55MapimiteZn2Fe33+(AsO4)3(OH)4 · 10H2O
8.DC.57OgdensburgiteCa2Fe43+(Zn,Mn2+)(AsO4)4(OH)6 · 6H2O
8.DC.60Nevadaite(Cu2+,Al,V3+)6Al8(PO4)8F8(OH)2 · 22H2O
8.DC.60Cloncurryite(Cu,VO)Al2(PO4)2(F,OH)2 · 4.5-5H2O
19.13.1BarbosaliteFe2+Fe23+(PO4)2(OH)2
19.13.2StrengiteFePO4 · 2H2O
19.13.3PhosphosideriteFePO4 · 2H2O
19.13.4DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
19.13.5GiniiteFe2+Fe43+(PO4)3(OH)5 · 2H2O
19.13.6WhitmoreiteFe2+Fe23+(PO4)2(OH)2 · 4H2O
19.13.7TinticiteFe3+5.34(PO4)3.62(VO4)0.38(OH)4 · 6.7H2O
19.13.9FerrostrunziteFe2+Fe23+(PO4)2(OH)2 · 6H2O
19.13.10BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
19.13.11VivianiteFe32+(PO4)2 · 8H2O
19.13.12MetavivianiteFe2+Fe23+(PO4)2(OH)2 · 6H2O

Other Names for Ferristrunzite

Name in Other Languages:

Other Information

Not fluorescent in UV
Health Risks:
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.

Internet Links for Ferristrunzite

Localities for Ferristrunzite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (TL)
 
  • 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
Brazil
 
  • Minas Gerais
    • Doce valley
      • Conselheiro Pena
Baijot, M., Hatert, F., Dal Rio, F. & Philipo, S. (2014) Mineralogy and petrography of phosphate mineral association from the Jocão pegmatite, Minas Gerais, Brazil. Canadian Mineralogist 52, 373-397.
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
      • 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.
USA
 
  • Wisconsin
    • Rusk Co.
      • Ladysmith
http://wgnhs.uwex.edu/minerals/ferristrunzite/
Mineral and/or Locality  
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