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IMA2000-020 Mineral Data
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General IMA2000-020 Information
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 Chemical Formula: |
Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) |
| Composition: |
Molecular Weight = 1,565.20 gm |
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Iron 14.27 % Fe 18.36 % FeO |
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Arsenic 33.51 % As 51.40 % As2O5 |
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Hydrogen 3.16 % H 28.20 % H2O |
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Oxygen 49.07 % O |
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______ ______ |
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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
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| 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 Space Group: Ortho |
| X Ray Diffraction: |
By Intensity(I/Io): 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), |
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Physical Properties of IMA2000-020
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| Color: |
Beige white. |
| Diaphaneity: |
Opaque |
| Luster: |
Earthy (Dull) |
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Optical Properties of IMA2000-020
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| 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 |
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Calculated Properties of IMA2000-020
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| Electron Density: |
Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of IMA2000-020 =2.56 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0032659481
Boson Index = 0.9967340519 |
| Photoelectric: |
PEIMA2000-020 = 26.45 barns/electron
U=PEIMA2000-020 x rElectron Density= 66.44 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
IMA2000-020 is Not Radioactive |
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IMA2000-020 Classification
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| Dana Class: |
39.02.08.01 (39)Hydrated Acid Phosphates, etc |
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(39.02)H2 (AB)5 (XO4)4 � x(H2O) |
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(39.02.08)Dana Group |
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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 |
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08.X - Unclassified Strunz PHOSPHATES, ARSENATES, VANADATES |
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08.XX -Arsenate, Basic Hydrated |
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08.XX.00 Arsenobismite? Bi2(AsO4)(OH)3 Unk Ortho |
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08.XX.00 Coeruleolactite (Ca,Cu)Al6(PO4)4(OH)8•4-5(H2O) P1 1 |
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08.XX.00 Cheralite-(Ce)? (Ce,Ca,Th)(P,Si)O4 P 21/n 2/m |
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08.XX.00 Chernovite-(Ce)* (Ce,Y)(AsO4) I 41/amd 4/m 2/m 2/m |
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08.XX.00 Kerstenite? PbSeO4(?) P nma 2/m 2/m 2/m |
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08.XX.00 Laubmannite? Fe3Fe6(PO4)4(OH)12 Unk Ortho |
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08.XX.00 Spodiosite? Ca2(PO4)F Pbcm 2/m 2/m 2/m |
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08.XX.00 Pseudo-autunite* (H3O)4Ca2(UO2)2(PO4)4•5(H2O)(?) Unk Ortho |
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08.XX.00 Viseite Ca10Al24(SiO4)6(PO4)7O22F3•72(H2O)(?) I a3d 4/m 3 2/m |
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08.XX.00 Vanuranylite? (H3O,Ba,Ca,K)1.6(UO2)2V2O8•4(H2O)(?) C 2/c ? 2/m |
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08.XX.00 Sodium-autunite Na2(UO2)2(PO4)2•8(H2O) P 4/nmm 4/m 2/m 2/m |
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08.XX.00 Sodium meta-autunite! Na2(UO2)2(PO4)2•6-8(H2O) P 4/nmm 4/m 2/m 2/m |
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08.XX.00 Slavkovite! Cu13(AsO4)6(AsO3OH)4•23(H2O) P1 1 |
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08.XX.00 IMA2000-020! Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O) Ortho Ortho |
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08.XX.00 Lewisite! (Ca,Fe,Na)2(Sb,Ti)2O7 F d3m 4/m 3 2/m |
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08.XX.00 Kamarizaite! Fe3(AsO4)2(OH)3•3H2O Pccm, Pcc2, Pcmm, Pcm21 Ortho |
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08.XX.00 Lapeyreite! Cu3O[AsO3(OH)]2•H2O C 2/m 2/m |
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08.XX.00 IMA2008-063 Pb[Zn0.25,[]0.75]Fe3H(AsO4)2(OH)6 C 2/c 2/m |
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08.XX.00 IMA2009-002! Cu3(AsO4)2 P 21/c 2/m |
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08.XX.00 IMA2009-005 (Y,Ca,REE)5[(Si,P)O4]3F P 63/m 6/m 2/m 2/m |
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08.XX.00 IMA2009-016 Cu4H(AsO4)2(OH)3•H2O P1 1 |
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Other IMA2000-020 Information
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| 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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IMA2000-020
Fe4[AsO3OH]5[AsO2(OH)2]2•20(H2O)
Dana No: 39.02.08.01 Strunz No: 08.XX.00
Locality:
Notes:
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