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Kusachiite

A valid IMA mineral species

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Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

Kusachiite

Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

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About KusachiiteHide

Isao Kusachi

Formula:

CuBi₂O₄

Colour:

Black

Lustre:

Metallic

Hardness:

4½

Specific Gravity:

8.5

Crystal System:

Tetragonal

Name:

Named in 1995 by Chiyoko Henmi in honor of Dr. Isao Kusachi (草地功) (14 September 1942, Okayama prefecture, Japan - ), Department of Earth Sciences, Faculty of Education, Okayama University, in recognition of his work on skarn minerals from Fuka. He authored/coauthored the description of about 10 new minerals.

Type Locality:

ⓘ Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

This page provides mineralogical data about Kusachiite.

Unique IdentifiersHide

Mindat ID:

2297

Long-form identifier:

mindat:1:1:2297:8

GUID
(UUID V4):

a81fd2a6-89df-44df-8497-a7ca83e9b0d8

IMA Classification of KusachiiteHide

IMA status:

Approved

IMA Formula:

Cu²⁺Bi³⁺₂O₄

First published:

1995

Type description reference:

Henmi, Chiyoko (1995) Kusachiite, CuBi₂O₄, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 59 (396) 545-548 doi:10.1180/minmag.1995.059.396.14

Classification of KusachiiteHide

Strunz-mindat (2024):

4.JA.20

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
A : Arsenites, antimonites, bismuthites; without additional anions, without H₂O

Dana 8th ed.:

7.2.6.1

7 : MULTIPLE OXIDES
2 : AB₂X₄

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Kus	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KusachiiteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Black

Streak:

Black

Hardness:

4½ on Mohs scale

Hardness:

VHN₂₅=292 - 357 kg/mm² - Vickers

Cleavage:

Perfect
Perfect {110}

Density:

8.5(3) g/cm³ (Measured) 8.64 g/cm³ (Calculated)

Optical Data of KusachiiteHide

Type:

Uniaxial

Anisotropism:

Weak to distinct

Bireflectance:

Weak

Reflectivity:

Wavelength	R₁	R₂	^imR₁	^imR₂
482nm	19.0%	21.1%	6.5%	7.8%
545nm	18.0%	20.2%	6.3%	7.1%
589nm	17.6%	19.7%	5.8%	6.7%
659nm	17.3%	19.5%	5.5%	6.6%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 21.1%.
R₁ shown in black, R₂ shown in red, ^imR₁ shown in green, ^imR₂ shown in blue

Colour in reflected light:

Gray

Internal Reflections:

Deep red to dark brown

Pleochroism:

Weak

Comments:

Gray, with faint bluish tint, and brownish gray

Chemistry of KusachiiteHide

Mindat Formula:

CuBi₂O₄

Elements listed:

Bi, Cu, O - search for minerals with similar chemistry

Crystallography of KusachiiteHide

Crystal System:

Tetragonal

Class (H-M):

4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal

Space Group:

P4/nnc

Setting:

P4/nnc

Cell Parameters:

a = 8.511(2) Å, c = 5.823(2) Å

Ratio:

a:c = 1 : 0.684

Unit Cell V:

421.80 Å³ (Calculated from Unit Cell)

Morphology:

Short prismatic crystals, to 0.5 mm; in globular aggregates.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Year	Locality	Temp (K)
0012142	Kusachiite	Boivin J, Trehoux J, Thomas D (1976) Etude structurale de CuBi2O4 _cod_database_code 1004051 Bulletin de la Societe Francaise de Mineralogie et de Cristallographie 99 193-196	1976		293
0013255	Kusachiite	Garcia-Munoz J L, Rodriguez-Carvajal J, Sapina F, Sanchis M J, Ibanez R, Beltran-Porter D (1990) Crystal and magnetic structures of Bi2CuO4 Journal of Physics: Condensed Matter 2 2205-2214	1990	synthetic	293
0013256	Kusachiite	Garcia-Munoz J L, Rodriguez-Carvajal J, Sapina F, Sanchis M J, Ibanez R, Beltran-Porter D (1990) Crystal and magnetic structures of Bi2CuO4 Journal of Physics: Condensed Matter 2 2205-2214	1990	synthetic	293
0013257	Kusachiite	Garcia-Munoz J L, Rodriguez-Carvajal J, Sapina F, Sanchis M J, Ibanez R, Beltran-Porter D (1990) Crystal and magnetic structures of Bi2CuO4 Journal of Physics: Condensed Matter 2 2205-2214	1990	synthetic	293
0013258	Kusachiite	Garcia-Munoz J L, Rodriguez-Carvajal J, Sapina F, Sanchis M J, Ibanez R, Beltran-Porter D (1990) Crystal and magnetic structures of Bi2CuO4 Journal of Physics: Condensed Matter 2 2205-2214	1990	synthetic	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Kusachiite'
loop_
_publ_author_name
'Boivin J'
'Trehoux J'
'Thomas D'
_journal_name_full 'Bulletin de la Societe Francaise de Mineralogie et de Cristallographie'
_journal_volume 99 
_journal_year 1976
_journal_page_first 193
_journal_page_last 196
_publ_section_title
;
 Etude structurale de CuBi2O4
 _cod_database_code 1004051
;
_database_code_amcsd 0012142
_chemical_formula_sum 'Bi2 Cu O4'
_cell_length_a 8.510
_cell_length_b 8.510
_cell_length_c 5.814
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 421.050
_exptl_crystal_density_diffrn      8.605
_symmetry_space_group_name_H-M 'P 4/n c c'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2-y,1/2-x,1/2+z'
  'y,x,1/2-z'
  'y,-x,-z'
  '1/2-y,1/2+x,z'
  'x,-y,1/2+z'
  '1/2-x,1/2+y,1/2-z'
  '1/2+x,1/2+y,-z'
  '-x,-y,z'
  '1/2+y,1/2+x,1/2+z'
  '-y,-x,1/2-z'
  '-y,x,-z'
  '1/2+y,1/2-x,z'
  '-x,y,1/2+z'
  '1/2+x,1/2-y,1/2-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Bi   0.16850   0.16850   0.25000
Cu   0.00000   0.50000   0.08000
O   0.29500   0.11400  -0.09700

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
3.191 Å	(100)
2.695 Å	(18)
1.947 Å	(18)
4.26 Å	(17)
2.913 Å	(16)
2.404 Å	(13)
1.728 Å	(12)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])

Type Occurrence of KusachiiteHide

Type Locality:

ⓘ Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan

General Appearance of Type Material:

Prismatic crystals up to 0.5 mm long and globular aggregates up to 2 mm in diameter, on calcite.

Place of Conservation of Type Material:

National Science Museum, Tokyo, Japan.

Geological Setting of Type Material:

Low-temperature hydrothermal origin in skarn.

Associated Minerals at Type Locality:

Thaumasite	Tenorite	Sillénite	Henmilite	Cuspidine
Bultfonteinite	Bakerite	Apophyllite Group

Reference:

Henmi, C. (1995) Kusachiite, CuBi2O4, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine: 59: 545-548.

Download:

https://rruff.info/rruff_1.0/uploads/MM59_545.pdf

Synonyms of KusachiiteHide

IMA1992-024

Other Language Names for KusachiiteHide

German:Kusachiit

Japanese:草地鉱

Spanish:Kusachiita

Related Minerals - Strunz-mindat Grouping Hide

4.JA.05	Leiteite	Zn(As₂O₄)	Mon. 2/m : P2₁/b
4.JA.10	Reinerite	Zn₃(AsO₃)₂	Orth. mmm (2/m 2/m 2/m) : Pbam
4.JA.15	Karibibite	Fe³⁺₃(As³⁺O₂)₄(As³⁺₂O₅)(OH)	Orth. mmm (2/m 2/m 2/m) : Pnma
4.JA.20	Schafarzikite	Fe²⁺Sb³⁺₂O₄	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mbc
4.JA.20	Trippkeite	Cu²⁺As³⁺₂O₄	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mbc
4.JA.20	Igelströmite	Fe³⁺(SbPb)O₄	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mbc
4.JA.20	Manganoschafarzikite	MnSb₂O₄	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mbc
4.JA.25	Apuanite	Fe²⁺Fe³⁺₄Sb³⁺₄O₁₂S	Tet. 4/mmm (4/m 2/m 2/m) : P4₂/mbc
4.JA.30	Versiliaite	Fe₂Fe₄Sb₆O₁₆S	Orth. mmm (2/m 2/m 2/m) : Pbam
4.JA.35	Schneiderhöhnite	Fe²⁺Fe³⁺₃As³⁺₅O₁₃	Tric. 1 : P1
4.JA.40	Zimbabweite	(Na,K)₂PbAs₄(Ta,Nb,Ti)₄O₁₈	Orth. mmm (2/m 2/m 2/m)
4.JA.45	Ludlockite	PbFe³⁺₄As³⁺₁₀O₂₂	Tric. 1 : P1
4.JA.50	Paulmooreite	Pb₂[As₂O₅]	Mon. 2/m : P2₁/b
4.JA.55	Stibivanite	Sb₂VO₅	Orth.
4.JA.60	Chadwickite	(UO₂)[HAsO₃]	Tet.

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for KusachiiteHide

mindat.org URL:

https://www.mindat.org/min-2297.html
Please feel free to link to this page.

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External Links:

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for KusachiiteHide

Reference List:

García-Muñoz, J.L., Rodríguez-Carvajal, J., Sapiña, F., Sanchis, M.J., Ibáñez, R., Beltrán-Porter, D. (1990) Crystal and magnetic structures of Bi2CuO4. Journal of Physics: Condensed Matter, 2, 2205-2214.

Henmi, Chiyoko (1995) Kusachiite, CuBi₂O₄, a new mineral from Fuka, Okayama Prefecture, Japan. Mineralogical Magazine, 59 (396) 545-548 doi:10.1180/minmag.1995.059.396.14

Mandarino, Joseph A. (1996) Abstracts of New Mineral Descriptions. The Mineralogical Record, 27 (4) 301-306

(2023) Kusachiite. Handbook of Mineralogy. Mineralogical Society of America

Localities for KusachiiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality.

- Good crystals or important locality for species.

- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.


Japan (TL)
Okayama Prefecture Takahashi City Bitchū Fuka ⓘ Fuka mine (TL)	Henmi (1995) +1 other reference

Poland
Lower Silesian Voivodeship Karkonosze County Piechowice ⓘ Michałowice granite quarry	Kozłowski et al. (2018)

Kusachiite

About KusachiiteHide

Unique IdentifiersHide

IMA Classification of KusachiiteHide

Classification of KusachiiteHide

Mineral SymbolsHide

Physical Properties of KusachiiteHide

Optical Data of KusachiiteHide

Chemistry of KusachiiteHide

Crystallography of KusachiiteHide

Crystal StructureHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of KusachiiteHide

Synonyms of KusachiiteHide

Other Language Names for KusachiiteHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for KusachiiteHide

References for KusachiiteHide

Localities for KusachiiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide