Mineralogy Database

Ferrostrunzite Mineral Data

Search Webmineral :

General Ferrostrunzite Information

Help on Chemical  Formula: Chemical Formula: Fe++Fe+++2(PO4)2(OH)2•6(H2O)
Help on Composition: Composition: Molecular Weight = 499.59 gm
   Iron        33.54 %  Fe   14.38 % FeO / 31.96 % Fe2O3
   Phosphorus  12.40 %  P    28.41 % P2O5
   Hydrogen     2.82 %  H    25.24 % H2O
   Oxygen      51.24 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+Fe3+2(PO4)2(OH)2•6(H2O)
Help on Environment: Environment: Secondary mineral in sedimentary rocks replacing rockbridgeite.
Help on IMA Status: IMA Status: Approved IMA 1983
Help on Locality: Locality: Mullica Hill, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its composition and for Hugo Strunz (1910-), mineralogist, Berlin, who authored the Strunz system of mineral classification.
Help on Name Pronunciation: Name Pronunciation: Ferrostrunzite + Pronunciation Say FERROSTRUNZITE

Ferrostrunzite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Yellowish acicular crystals of ferrostrunzite.
Location: Gravel Hill mine, Perranzabuloe, Cornwall, England, UK. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Ferrostrunzite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.047:1:0.7543
Help on Cell Dimensions: Cell Dimensions: a = 10.23, b = 9.77, c = 7.37, Z = 2; alpha = 89.65°, beta = 98.28°, gamma = 117.26° V = 647.96 Den(Calc)= 2.56
Help on Crystal System: Crystal System: Triclinic Space Group: P 1,P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.29(1), 8.94(0.8), 3.277(0.4),

Physical Properties of Ferrostrunzite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Yellow brown, Light brown, Colorless.
Help on Density: Density: 2.5
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light brown

Optical Properties of Ferrostrunzite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2637,KPDmeas= 0.2711,KC= 0.2655
Ncalc = 1.66 - 1.68
Help on Optical Data: Optical Data: Biaxial (-), a=1.628, b=1.682, g=1.723, bire=0.0950, 2V(Calc)=78, 2V(Meas)=80.
Help on Pleochroism (x): Pleochroism (x): pale yellow green.
Help on Pleochroism (z): Pleochroism (z): pale red yellow.

Calculated Properties of Ferrostrunzite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Ferrostrunzite =2.57 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0073597563
Boson Index = 0.9926402437
Help on Photoelectric: Photoelectric: PEFerrostrunzite = 10.43 barns/electron
U=PEFerrostrunzite x rElectron Density= 26.81 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Ferrostrunzite is Not Radioactive

Ferrostrunzite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.09)Strunzite Group Strunzite MnFe2(PO4)2(OH)2•6(H2O) P1 1 Ferrostrunzite FeFe2(PO4)2(OH)2•6(H2O) P 1,P1 Tri Ferristrunzite FeFe2(PO4)2(OH)3•5(H2O) P1,P 1 Tri
Help on  Strunz Class: Strunz Class: 08.DC.25 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.25 Ferrostrunzite FeFe2(PO4)2(OH)2•6(H2O) P 1,P1 Tri
08.DC.25 Ferristrunzite FeFe2(PO4)2(OH)3•5(H2O) P1,P 1 Tri
08.DC.25 Metavauxite FeAl2(PO4)2(OH)2•8(H2O) P 21/c 2/m
08.DC.25 Strunzite MnFe2(PO4)2(OH)2•6(H2O) P1 1

Other Ferrostrunzite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Ferrostrunzite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Ferrostrunzite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Ferrostrunzite :

Ask about Ferrostrunzite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espa�ol

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


Dana No: Strunz No: 08.DC.25





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.