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Kusachiite Mineral Data
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General Kusachiite Information
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 Chemical Formula: |
CuBi2O4 |
| Composition: |
Molecular Weight = 545.50 gm |
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Copper 11.65 % Cu 13.12 % Cu2O |
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Bismuth 76.62 % Bi 85.42 % Bi2O3 |
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Oxygen 11.73 % O |
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______ ______ |
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100.00 % 98.53 % = TOTAL OXIDE |
| Empirical Formula: |
CuBi2O4 |
| Environment: |
On calcite crystals in a calcite vein which occurs along the boundary between gehlenite-surrite skarn and crystalline limestone. |
| IMA Status: |
Approved IMA 1995 |
| Locality: |
Fika, Bitchu-Cho, Okayama Prefecture, Japan. Link to MinDat.org Location Data. |
| Name Origin: |
For Dr. Isao Kusachi (1942- ), of Okayama University in recognition of his work on the skarn minerals of the locality. |
| Name Pronunciation: |
Kusachiite + Pronunciation  |
| Synonym: |
ICSD 68815 |
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IMA1992-024 |
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PDF 48-1868 |
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Kusachiite Image |
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Images:
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Kusachiite
Comments: Black kusachiite with blue henmilite.
Location: Fuka, Bicchu-cho, Okayama Prefecture, Japan.
Scale: Picture Size 0.5 mm.
© Thomas Witzke |
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Kusachiite Crystallography
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| Axial Ratios: |
a:c = 1:0.68417 |
| Cell Dimensions: |
a = 8.511, c = 5.823, Z = 4; V = 421.80 Den(Calc)= 8.59 |
| Crystal System: |
Tetragonal - Ditetragonal Dipyramidal H-M Symbol (4/m 2/m 2/m) Space Group: P 4/ncc |
| X Ray Diffraction: |
By Intensity(I/Io): 3.191(1), 1.947(0.18), 2.695(0.18), |
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Physical Properties of Kusachiite
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| Cleavage: |
{110} Perfect |
| Color: |
Black. |
| Density: |
8.5 |
| Diaphaneity: |
Opaque |
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. |
| Habit: |
Globular - Spherical, or nearly so, rounded forms (e.g. wavellite). |
| Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
| Hardness: |
4-5 - Fluorite-Apatite |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Kusachiite
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| Optical Data: |
Uniaxial (?). |
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NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.1614) where Ncalc=Dcalc*KC+1
NCalc= 2.37 - from Gladstone-Dale relationship (KC = 0.1614) where Ncalc=Dmeas*KC+1
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| RL Anisotrophism: |
Weak to distinct. |
| RL Bireflectance: |
Weak. |
| RL Color: |
Gray, with deep red to dark brown internal reflections. |
| RL Pleochroism: |
Gray with a faint bluish tint, and brownish gray. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Kusachiite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 482 nm |
19.00 |
21.50 |
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| 545 nm |
18.00 |
20.20 |
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| 589 nm |
17.60 |
19.70 |
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| 650 nm |
17.30 |
19.50 |
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Calculated Relative Intensity Colors of Kusachiite in Air
Relative
Intensity |
0% |
50% |
100% |
150% |
200% |
250% |
300% |
350% |
400% |
450% |
500% |
| R1 |
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| R2 |
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Calculated Properties of Kusachiite
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| Electron Density: |
Bulk Density (Electron Density)=7.15 gm/cc
note: Specific Gravity of Kusachiite =8.59 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0000570789
Boson Index = 0.9999429211 |
| Photoelectric: |
PEKusachiite =1,487.44 barns/electron
U=PEKusachiite x rElectron Density=10633.86 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Kusachiite is Not Radioactive |
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Kusachiite Classification
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| Dana Class: |
07.02.06.01 (07)Multiple Oxides |
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(07.02)(A+ B++)2 X4 Spinel group |
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(07.02.06)Dana Group |
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07.02.06.01 Kusachiite CuBi2O4 P 4/ncc 4/m 2/m 2/m |
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07.02.06.02 Iwakiite Mn(Fe,Mn)2O4 P 41/nnm 4/m 2/m 2/m |
| Strunz Class: |
04.JA.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.J - Arsenites, Antimonites, Bismuthites, Sulfites, |
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04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O |
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04.JA.20 Kusachiite CuBi2O4 P 4/ncc 4/m 2/m 2/m |
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04.JA.20 Schafarzikite FeSb2O4 P 41/mbc 4/m 2/m 2/m |
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04.JA.20 Trippkeite CuAs2O4 P 41/mbc 4/m 2/m 2/m |
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Other Kusachiite Information
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| References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(AntBidBlaNic3) |
| See Also: |
Links to other databases for Kusachiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info
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Kusachiite
CuBi2O4
Dana No: 07.02.06.01 Strunz No: 04.JA.20
Locality:
Notes:
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