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Kinichilite
A valid IMA mineral species
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About Kinichilite
Dr. Kinichi Sakurai
Formula:
Mg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2O
Colour:
Dark Brown
Lustre:
Sub-Adamantine
Hardness:
2
Specific Gravity:
4.11 (Calculated)
Crystal System:
Hexagonal
Member of:
Name:
Named in 1981 by Hidemichi Hori, Eiji Koyama, and Kozo Nagashima in honor of Dr. Kin-ichi Sakurai (December 11, 1912, Tokyo – October 6, 1993), amateur mineralogist of Tokyo. He described and/or provided type material for half a dozen species. The mineral sakuraiite is also named in his honor.
Unique Identifiers
Mindat ID:
2212
Long-form identifier:
mindat:1:1:2212:1
Similar Names
| Conchilite | A synonym of 'Conchilites' |
IMA Classification of Kinichilite
Classification of Kinichilite
4.JM.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
M : Tellurites without additional anions, with H2O
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
J : Arsenites, antimonites, bismuthites, sulfites, selenites, tellurites; iodates
M : Tellurites without additional anions, with H2O
34.3.2.2
34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
34 : SELENITES, TELLURITES AND SULFITES
3 : A2(XO3)3·xH2O
28.3.9
28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
28 : Selenites, Selenates, Tellurites, and Tellurates
3 : Tellurites
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Kni | 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 Kinichilite
Sub-Adamantine
Transparency:
Translucent
Colour:
Dark Brown
Streak:
Brown
Hardness:
2 on Mohs scale
Tenacity:
Fragile
Cleavage:
None Observed
Density:
4.11 g/cm3 (Calculated)
Optical Data of Kinichilite
Type:
Uniaxial (+)
RI values:
nω = 1.8 nε = 1.8
Surface Relief:
Very High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized uniaxial interference figure - the conoscopic
(convergent-light, Bertrand-lens-in) view, for a grain cut with the optic axis
centred and vertical. The coloured rings are isochromatics, computed with the
same physics as the Michel-Lévy bar above; the dark cross is the isogyre.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
For a genuinely uniaxial mineral viewed this way, that cross stays perfectly stationary if you rotate the stage - unlike a biaxial mineral, where it splits apart on rotation. That invariance is itself the standard diagnostic test for telling uniaxial and biaxial minerals apart at the microscope.
Pleochroism:
Weak
Comments:
Pale brown to yellowish brown
Comments:
Indices => 1.8
Chemistry of Kinichilite
Mindat Formula:
Mg0.5Mn2+Fe3+(Te4+O3)3 · 4.5H2O
Element Weights:
Crystallography of Kinichilite
Crystal System:
Hexagonal
Class (H-M):
6/m - Dipyramidal
Space Group:
P63/m
Cell Parameters:
a = 9.451(7) Å, c = 7.687(3) Å
Ratio:
a:c = 1 : 0.813
Unit Cell V:
594.62 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Imperfect hexagonal prisms to 2mm.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0006593 | Kinichilite | Miletich F (1995) Crystal chemistry of the microporous tellurite minerals zemannite and kinichilite, Mg0.5[MeFe(TeO3)3].4.5H2O, (Me=Zn;Mn) European Journal of Mineralogy 7 509-523 | 1995 | Kawazu Mine, Rendaiji, Shimoda City, Shizuoka Prefecture, Japan | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.079 Å | (100) |
| 8.15 Å | (90) |
| 2.790 Å | (85) |
| 2.861 Å | (50) |
| 3.824 Å | (35) |
| 2.966 Å | (30) |
| 1.735 Å | (20) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] |
Type Occurrence of Kinichilite
General Appearance of Type Material:
Hexagonal prisms to 2 mm.
Place of Conservation of Type Material:
National Science Museum, Tokyo, Japan, M-23380.
National Museum of Natural History, Washington, D.C., USA, 164269.
National Museum of Natural History, Washington, D.C., USA, 164269.
Geological Setting of Type Material:
Oxidation zone of low temperature hydrothermal Au-Ag-Te quartz veins.
Associated Minerals at Type Locality:
Synonyms of Kinichilite
Other Language Names for Kinichilite
Relationship of Kinichilite to other Species
Member of:
Other Members of Zemannite Group:
| Ilirneyite | Mg0.5ZnMn3+(Te4+O3)3 · 4.5H2O | Hex. 6/m : P63/m |
| Keystoneite | Mg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2O | Hex. 6 : P63 |
| Zemannite | Mg0.5ZnFe3+(Te4+O3)3 · 4.5H2O | Trig. 3 : P3 |
Common Associates
Related Minerals - Strunz-mindat Grouping
| 4.JM. | Wortupaite | MgNi2+2(Te4+O3)3 · 3H2O |
| 4.JM. | Rudolfhermannite | Fe3+2(Te4+O3)3(H2O) |
| 4.JM.05 | Zemannite | Mg0.5ZnFe3+(Te4+O3)3 · 4.5H2O |
| 4.JM.05 | Keystoneite | Mg0.5Ni2+Fe3+(Te4+O3)3 · 4.5H2O |
| 4.JM.05 | Ilirneyite | Mg0.5ZnMn3+(Te4+O3)3 · 4.5H2O |
| 4.JM.10 | Emmonsite | Fe3+2(TeO3)3 · 2H2O |
| 4.JM.10 | Blakeite | Fe3+2[TeO3]3 (?) |
| 4.JM.15 | Graemite | Cu[TeO3] · H2O |
| 4.JM.20 | Telluromandarinoite | Fe3+2Te3O9 · 6H2O |
| 4.JM.20 | Teineite | Cu2+(Te4+O3) · 2H2O |
| 4.JM.25 | Millsite | Cu2+(Te4+O3) · 2H2O |
Other Information
Notes:
Readily soluble in HCl and HNO3.
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 Kinichilite
mindat.org URL:
https://www.mindat.org/min-2212.html
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Please feel free to link to this page.
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References for Kinichilite
Reference List:
Kawazu mine, Rendaiji, Shimoda City, Shizuoka Prefecture, Japan