Xieite Mineral Data

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General Xieite Information

Chemical Formula:

FeCr2O4

Composition:

Molecular Weight = 212.12 gm

Magnesium 1.49 % Mg 2.47 % MgO

Titanium 1.81 % Ti 3.01 % TiO₂

Manganese 0.26 % Mn 0.33 % MnO

Aluminum 3.18 % Al 6.01 % Al₂O₃

Vanadium 0.48 % V 0.86 % V₂O₅

Chromium 39.71 % Cr 51.93 % CrO

Iron 22.91 % Fe 29.47 % FeO

Oxygen 30.17 % O

______ ______

100.00 % 94.08 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.87Mg_0.13Mn²⁺_0.01Cr_1.62Al_0.25Ti_0.08V⁵⁺_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

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 - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Bbmm

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

By Intensity(I/I_o): 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),

Optical Properties of Xieite

Optical Data:

NCalc= 2.03 - from Gladstone-Dale relationship (KC = 0.1931) where Ncalc=Dcalc*KC+1

Calculated Properties of Xieite

Electron Density:

Bulk Density (Electron Density)=5.07 gm/cc
note: Specific Gravity of Xieite =5.34 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Xieite= 16.65 barns/electron
U=PE_Xieite x rElectron Density= 84.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xieite is Not Radioactive

Xieite Classification

Dana Class:

07.02.15.01 (07)Multiple Oxides

(07.02)(A+ B++)2 X4 Spinel group

(07.02.15)Dana Group

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

04.B - Metal:Oxygen = 3:4 and similar

04.BB -With only medium-sized cations

04.BB.25 Xieite! FeCr2O4 Bbmm 2/m 2/m 2/m

Other Xieite Information

See Also:

Links to other databases for Xieite :
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)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Xieite Specimen Label here :

Xieite

FeCr2O4
Dana No: 07.02.15.01 Strunz No: 04.BB.25
Locality:

Notes: