Mineralogy Database

Symplesite Mineral Data

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General Symplesite Information

Help on Chemical  Formula: Chemical Formula: Fe++3(AsO4)2•8(H2O)
Help on Composition: Composition: Molecular Weight = 589.50 gm
   Iron      28.42 %  Fe   40.63 % Fe2O3
   Arsenic   25.42 %  As   38.99 % As2O5
   Hydrogen   2.74 %  H    24.45 % H2O
   Oxygen    43.42 %  O
            ______        ______ 
            100.00 %      104.07 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe3+3(AsO4)2•8(H2O)
Help on Environment: Environment: Dimorphous with parasymplesite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1837
Help on Locality: Locality: Lobenstein, Voigtland, Germany Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, syn, "together" and plesiazein, "to associate."
Help on Name Pronunciation: Name Pronunciation: Symplesite + Pronunciation Say SYMPLESITE

Symplesite Image

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Comments: Fan-shaped spray of acicular symplesite on matrix.
Location: Saubachthal, Saxony, Germany. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Symplesite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.8469:1:0.5015
Help on Cell Dimensions: Cell Dimensions: a = 7.97, b = 9.41, c = 4.72, Z = 1; alpha = 99.917°, beta = 97.383°, gamma = 105.967° V = 332.47 Den(Calc)= 2.94
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): 6.79(1), 7.5(0.16), 8.97(0.16),

Physical Properties of Symplesite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Blue, Greenish black, Gray green, Light blue, Light green.
Help on Density: Density: 2.96 - 3, Average = 2.98
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Fine - Occurs as well-formed fine sized crystals.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: bluish white

Optical Properties of Symplesite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.182 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.18 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.225,KPDmeas= 0.2243,KC= 0.2743
Ncalc = 1.81 - 1.82
Help on Optical Data: Optical Data: Biaxial (-), a=1.635, b=1.668, g=1.702, bire=0.0670, 2V(Calc)=88, 2V(Meas)=87.
Help on Pleochroism (x): Pleochroism (x): deep blue.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): yellow.

Calculated Properties of Symplesite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.90 gm/cc
note: Specific Gravity of Symplesite =2.97 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0062377496
Boson Index = 0.9937622504
Help on Photoelectric: Photoelectric: PESymplesite = 25.38 barns/electron
U=PESymplesite x rElectron Density= 73.66 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Symplesite is Not Radioactive

Symplesite Classification

Help on  Dana Class: Dana Class: (40)Hydrated Phosphates, etc
  (40.03)where (A++)3 (XO4)2 � x(H2O)
  (40.03.08)Dana Group Symplesite Fe3(AsO4)2•8(H2O) P1 1 Metakottigite (Zn,Fe,Fe)3(AsO4)2•8((H2O),OH) P1 1
Help on  Strunz Class: Strunz Class: 08.CE.45 08 - PHOSPHATES, ARSENATES, VANADATES
  08.C - Phosphates without Additional Anions, with H2O
  08.CE -With only medium-sized cations, RO4:H2O � 1:2.5
08.CE.45 Symplesite Fe3(AsO4)2•8(H2O) P1 1

Other Symplesite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Symplesite :
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 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: Strunz No: 08.CE.45





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