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Xieite Mineral Data
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General Xieite Information
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 Chemical Formula: |
FeCr2O4 |
| Composition: |
Molecular Weight = 212.12 gm |
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Magnesium 1.49 % Mg 2.47 % MgO |
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Titanium 1.81 % Ti 3.01 % TiO2 |
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Manganese 0.26 % Mn 0.33 % MnO |
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Aluminum 3.18 % Al 6.01 % Al2O3 |
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Vanadium 0.48 % V 0.86 % V2O5 |
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Chromium 39.71 % Cr 51.93 % CrO |
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Iron 22.91 % Fe 29.47 % FeO |
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Oxygen 30.17 % O |
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______ ______ |
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100.00 % 94.08 % = TOTAL OXIDE |
| Empirical Formula: |
Fe2+0.87Mg0.13Mn2+0.01Cr1.62Al0.25Ti0.08V5+0.02O4 |
| Environment: |
Occurs in the shock vein. High pressure polymorph of chromite. Potential deep mantle mineral. Spinel group. |
| IMA Status: |
Approved IMA 2007 (Dana # Added) |
| Locality: |
Suizhou L6 chondrite: Dayanpo, Suizhou County, Hubei Province, China. Link to MinDat.org Location Data. |
| Name Origin: |
Named for Xie Xiande, a GIG mineralogist who has made major contribution to the field of mineral shock effects. |
| Synonym: |
IMA2007-056 |
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Xieite Crystallography
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| Axial Ratios: |
a:b:c =0.9895:1:0.3049 |
| Cell Dimensions: |
a = 9.462, b = 9.562, c = 2.916, Z = 4; V = 263.83 Den(Calc)= 5.34 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Bbmm |
| X Ray Diffraction: |
By Intensity(I/Io): 2.65(1), 1.953(0.9), 1.566(0.6),1.337(0.4), 2.389(0.2), 1.425(0.15), 1.439(0.15), 2.089(0.1), |
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Optical Properties of Xieite
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| Optical Data: |
NCalc= 2.03 - from Gladstone-Dale relationship (KC = 0.1931) where Ncalc=Dcalc*KC+1
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Calculated Properties of Xieite
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| Electron Density: |
Bulk Density (Electron Density)=5.07 gm/cc
note: Specific Gravity of Xieite =5.34 gm/cc.
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| Fermion Index: |
Fermion Index = 0.04
Boson Index = 0.96 |
| Photoelectric: |
PEXieite = 16.65 barns/electron
U=PEXieite x rElectron Density= 84.48 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xieite is Not Radioactive |
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Xieite Classification
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| Dana Class: |
07.02.15.01 (07)Multiple Oxides |
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(07.02)(A+ B++)2 X4 Spinel group |
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(07.02.15)Dana Group |
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07.02.15.01 Xieite! FeCr2O4 Bbmm 2/m 2/m 2/m |
| Strunz Class: |
04.BB.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.B - Metal:Oxygen = 3:4 and similar |
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04.BB -With only medium-sized cations |
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04.BB.25 Xieite! FeCr2O4 Bbmm 2/m 2/m 2/m |
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Other Xieite Information
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| See Also: |
Links to other databases for Xieite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Ask about Xieite here :
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Print or Cut-and-Paste your Xieite Specimen Label here :
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Xieite
FeCr2O4
Dana No: 07.02.15.01 Strunz No: 04.BB.25
Locality:
Notes:
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