IMA2000-020 Mineral Data

IMA2000-020 Mineral Data

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General IMA2000-020 Information

Chemical Formula:

Fe4[AsO3OH]5[AsO2(OH)2]2·20(H2O)

Composition:

Molecular Weight = 1,565.20 gm

Iron 14.27 % Fe 18.36 % FeO

Arsenic 33.51 % As 12.64 % As₂O₃ / 36.71 % As₂O₅

Hydrogen 3.16 % H 28.20 % H₂O

Oxygen 49.07 % O

______ ______

100.00 % 95.91 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺₄(AsO₃OH)₅As₂O₄(OH)₄·20(H₂O)

IMA Status:

Proposed IMA 2000 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

Search for IMA2000-020 Images

Images:

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Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

IMA2000-020 Crystallography

Axial Ratios:

a:b:c =0.561:1:0.5261

Cell Dimensions:

a = 10.676, b = 19.027, c = 10.012, Z = 2; V = 2,033.76 Den(Calc)= 2.56

Crystal System:

Orthorhombic

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 9.5(1), 9.31(0.85), 3.586(0.39),4.221(0.35), 3.302(0.24), 6.81(0.24), 5.45(0.23),

Physical Properties of IMA2000-020

Color:

Beige white.

Diaphaniety:

Opaque

Luster:

Earthy (Dull)

Optical Properties of IMA2000-020

Optical Data:

Biaxial (?), a=1.615

Calculated Properties of IMA2000-020

Electron Density:

r_electron=2.51 gm/cc
note: r_IMA2000-020=2.56 gm/cc.

Fermion Index

Fermion Index = 0.00326
Boson Index = 0.99674

Photoelectric:

PE_IMA2000-020= 26.45 barns/electron
U=PE_IMA2000-020 x r_electron= 66.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

IMA2000-020 is Not Radioactive

IMA2000-020 Classification

Dana Class:

39.2.8.1 (39)Hydrated Acid Phosphates, etc

(39.2)H2 (AB)5 (XO4)4 · x(H2O)

(39.2.8)Dana Group

39.2.8.1 IMA2000-020 ! Fe4[AsO3OH]5[AsO2(OH)2]2·20(H2O) Ortho

Strunz Class:

VII/X.00-00 VII - Phosphates, Arsenates and Vanadates

VII/X - Unclassified Strunz Phosphates, Arsenates and Vanadates

VII/X.00 - Arsenate, Basic Hydrated

Other IMA2000-020 Information

See Also:

Links to other databases for IMA2000-020 :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch)

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Print or Cut-and-Paste your IMA2000-020 Specimen Label here :

IMA2000-020

Fe4[AsO3OH]5[AsO2(OH)2]2·20(H2O)
Dana No: 39.2.8.1 Strunz No: VII/X.00-00
Locality:

Notes: