IMA2000-020 Mineral Data

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 51.40 % As₂O₅

Hydrogen 3.16 % H 28.20 % H₂O

Oxygen 49.07 % O

______ ______

100.00 % 97.96 % = 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, Nomenclature and Classification (CNMNC)

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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:

OrthorhombicSpace Group: Ortho

$Help on X Ray Diffraction:$ 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.

Diaphaneity:

Opaque

Luster:

Earthy (Dull)

Optical Properties of IMA2000-020

Gladstone-Dale:

CI calc= -0.124 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2402,KC= 0.2137
Ncalc = 1.55

Optical Data:

Biaxial (?), a=1.615

Calculated Properties of IMA2000-020

Electron Density:

Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of IMA2000-020 =2.56 gm/cc.

Fermion Index:

Fermion Index = 0.0032659481
Boson Index = 0.9967340519

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
IMA2000-020 is Not Radioactive

IMA2000-020 Classification

Dana Class:

39.02.08.01 (39)Hydrated Acid Phosphates, etc

(39.02)H2 (AB)5 (XO4)4 · x(H2O)

(39.02.08)Dana Group

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

Strunz Class:

08.XX.00 08 - PHOSPHATES, ARSENATES, VANADATES

08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES

08.XX -Arsenate, Basic Hydrated

08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho

08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1

08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 2₁/n 2/m

08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 4₁/amd 4/m 2/m 2/m

08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m

08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho

08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m

08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho

08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m

08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m

08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m

08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1

08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho

08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m

08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho

08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m

08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m

08.XX.00 IMA2009-002! Cu3(AsO4)2 P 2₁/c 2/m

08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 6₃/m 6/m 2/m 2/m

08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1

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 - Mineralienatlas (Deutsch)
7 - Online Mineral Museum
8 - Ruff.Info

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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: 39.02.08.01 Strunz No: 08.XX.00
Locality:

Notes: