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Strunzite Mineral Data

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General Strunzite Information

Help on Chemical  Formula: Chemical Formula: Mn++Fe+++2(PO4)2(OH)2•6(H2O)
Help on Composition: Composition: Molecular Weight = 498.68 gm
   Manganese   11.02 %  Mn   14.23 % MnO
   Iron        22.40 %  Fe   32.02 % Fe2O3
   Phosphorus  12.42 %  P    28.46 % P2O5
   Hydrogen     2.83 %  H    25.29 % H2O
   Oxygen      51.33 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Mn2+Fe3+2(PO4)2(OH)2•6(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1958
Help on Locality: Locality: Hangedor Pegmatite, Oberfalz, Bavaria, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Hugo Strunz (1910-), mineralogist, Berlin, who authored the Strunz system of mineral classification.
Help on Name Pronunciation: Name Pronunciation: Strunzite + Pronunciation Say STRUNZITE
Help on Synonym: Synonym: ICSD 100409
  PDF 11-133

Strunzite Image

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Comments: Acicular, stellate sprays of strunzite crystals on matrix.
Location: Palermo #1 mine, North Groton, Grafton County, New Hampshire, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Strunzite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.0397:1:0.7404
Help on Cell Dimensions: Cell Dimensions: a = 10.228, b = 9.837, c = 7.284, Z = 2; alpha = 90.17°, beta = 98.44°, gamma = 117.44° V = 643.37 Den(Calc)= 2.57
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.02(1), 5.32(0.8), 4.35(0.6),

Physical Properties of Strunzite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Brownish yellow, Golden yellow, Straw yellow.
Help on Density: Density: 2.47 - 2.56, Average = 2.51
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Lath - Shaped like a small, thin plaster lath, tabular (rectangular) in shape.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: light yellow

Optical Properties of Strunzite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2596,KPDmeas= 0.2663,KC= 0.267
Ncalc = 1.66 - 1.69
Help on Optical Data: Optical Data: Biaxial (-), a=1.619, b=1.67, g=1.72, bire=0.1010, 2V(Calc)=86, 2V(Meas)=75-80.
Help on Pleochroism (x): Pleochroism (x): pale yellow.
Help on Pleochroism (y): Pleochroism (y): pale yellow.
Help on Pleochroism (z): Pleochroism (z): yellow.

Calculated Properties of Strunzite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of Strunzite =2.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0049989957
Boson Index = 0.9950010043
Help on Photoelectric: Photoelectric: PEStrunzite = 9.93 barns/electron
U=PEStrunzite x rElectron Density= 24.94 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Strunzite is Not Radioactive

Strunzite 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 Strunzite Information

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

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Dana No: Strunz No: 08.DC.25





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