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Asagiite
A valid IMA mineral species
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About Asagiite
Asagi-iro, a traditional color of Japan
Formula:
NiCu4(SO4)2(OH)6 · 6H2O
Colour:
Pale blue-green (unique enough to impart its name)
Lustre:
Vitreous
Hardness:
2½
Specific Gravity:
2.90
Crystal System:
Monoclinic
Member of:
Name:
Named for its unique colour, Japanese asagi-iro.
Type Locality:
Unique Identifiers
Mindat ID:
470431
Long-form identifier:
mindat:1:1:470431:3
IMA Classification of Asagiite
Approved
IMA Formula:
Ni2+Cu2+4(S6+O4)2(OH)6·6H2O
Approval year:
2022
First published:
2023
Type description reference:
Nishio-Hamane, Daisuke, Yajima, Takeshi, Shimobayashi, Norimasa, Ohnishi, Masayuki, Niwa, Takefumi (2023) Asagiite, NiCu4(SO4)2(OH)6·6H2O, a new member of the ktenasite group from the Nakauri mine, Shinshiro City, Aichi Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 118 (1). 230711 doi:10.2465/jmps.230711
Classification of Asagiite
7.DD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
D : Sulfates (selenates, etc.) with additional anions, with H2O
D : With only medium-sized cations; sheets of edge-sharing octahedra
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 |
|---|---|---|
| Asa | 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 Asagiite
Vitreous
Transparency:
Transparent
Colour:
Pale blue-green (unique enough to impart its name)
Streak:
White
Hardness:
2½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {001}
on {001}
Density:
2.90(3) g/cm3 (Measured) 2.92 g/cm3 (Calculated)
Optical Data of Asagiite
Type:
Biaxial (-)
RI values:
nα = 1.577(2) nβ = 1.620(2) nγ = 1.631(2)
2V:
Calculated: 52.4°
Max. Birefringence:
δ = 0.054
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
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 biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Chemistry of Asagiite
Mindat Formula:
NiCu4(SO4)2(OH)6 · 6H2O
Element Weights:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Cu3.44Ni0.76Zn0.59Co0.18Fe0.01)Σ4.98S2O7.95(OH)6.05 · 6H2O |
Sample references:
Crystallography of Asagiite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/c
Setting:
P21/c
Cell Parameters:
a = 5.6095(8) Å, b = 6.1259(7) Å, c = 23.758(3) Å
β = 95.288(4)°
β = 95.288(4)°
Ratio:
a:b:c = 0.916 : 1 : 3.878
Unit Cell V:
812.93 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.83 Å | (100) |
| 5.912 Å | (64) |
| 4.845 Å | (55) |
| 3.920 Å | (45) |
| 2.953 Å | (33) |
| 2.668 Å | (57) |
| 2.571 Å | (36) |
| 2.142 Å | (33) |
Type Occurrence of Asagiite
General Appearance of Type Material:
Thin plate-like crystals (typically 0.1-0.2 mm, rarely up to 0.5 mm in length), growing on smithsonite aggregates.
Place of Conservation of Type Material:
Type material is deposited in the collections of the National Museum of Nature and Science, Amakubo, Tsukuba, Ibaraki 305-0005, Japan, specimen number NSM-M49723.
Geological Setting of Type Material:
Secondary mineral of fractures in a serpentinite.
Reference:
Nishio-Hamane, Daisuke, Yajima, Takeshi, Shimobayashi, Norimasa, Ohnishi, Masayuki, Niwa, Takefumi (2023) Asagiite, NiCu4(SO4)2(OH)6·6H2O, a new member of the ktenasite group from the Nakauri mine, Shinshiro City, Aichi Prefecture, Japan. Journal of Mineralogical and Petrological Sciences, 118 (1). 230711 doi:10.2465/jmps.230711
Synonyms of Asagiite
Other Language Names for Asagiite
Relationship of Asagiite to other Species
Member of:
Other Members of Ktenasite Group:
| Fehrite | MgCu4(SO4)2(OH)6 · 6H2O | Mon. 2/m : P21/c |
| Gobelinite | CoCu4(SO4)2(OH)6 · 6H2O | Mon. 2/m : P21/m |
| Ktenasite | ZnCu4(SO4)2(OH)6 · 6H2O | Mon. 2/m : P21/c |
| 'Unnamed (Zn-analogue of Ktenasite)' | Zn(Zn,Cu)4(SO4)2(OH)6 · 6H2O |
Common Associates
Associations Based on Photo Data:
| 4 photos of Asagiite associated with Chalcopyrite | CuFeS2 |
| 2 photos of Asagiite associated with Quartz | SiO2 |
| 2 photos of Asagiite associated with Gypsum | CaSO4 · 2H2O |
| 2 photos of Asagiite associated with Calcite | CaCO3 |
| 1 photo of Asagiite associated with Babánekite | Cu3(AsO4)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 7.DD.05 | Felsőbányaite | Al4(SO4)(OH)10 · 4H2O |
| 7.DD.07 | Llantenesite | Cu6Al[SeO4](OH)12Cl · 3H2O |
| 7.DD.10 | Langite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Fehrite | MgCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.10 | Posnjakite | Cu4(SO4)(OH)6 · H2O |
| 7.DD.10 | Wroewolfeite | Cu4(SO4)(OH)6 · 2H2O |
| 7.DD.10 | Gobelinite | CoCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.15 | Kobyashevite | Cu5(SO4)2(OH)6 · 4H2O |
| 7.DD.15 | Spangolite | Cu6Al(SO4)(OH)12Cl · 3H2O |
| 7.DD.15 | 'Unnamed (Dimorph of Devilline)' | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.20 | Ktenasite | ZnCu4(SO4)2(OH)6 · 6H2O |
| 7.DD.25 | Christelite | Cu2Zn3(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Edwardsite | Cu3Cd2(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Niedermayrite | CdCu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Serpierite | Ca(Cu2+,Zn2+)4(S6+O4)2(OH)6 · 3H2O |
| 7.DD.30 | Campigliaite | Mn2+Cu4(SO4)2(OH)6 · 4H2O |
| 7.DD.30 | Orthoserpierite | Ca(Cu,Zn)4(SO4)2(OH)6 · 3H2O |
| 7.DD.30 | Devilline | CaCu4(SO4)2(OH)6 · 3H2O |
| 7.DD.35 | Shigaite | Mn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Zincaluminite | (Zn1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Zincowoodwardite | Zn1-xAlx(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Natroglaucocerinite | Zn6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrowoodwardite | (Cu1-xAlx)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Honessite | (Ni1-xFe3+x)(OH)2[SO4]x/2 · nH2O |
| 7.DD.35 | Carrboydite | (Ni1-xAlx)(SO4)x/2(OH)2 · nH2O |
| 7.DD.35 | Glaucocerinite | (Zn1-xAlx)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Wermlandite | Mg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Nikischerite | Fe2+6Al3(OH)18[Na(H2O)6](SO4)2 · 6H2O |
| 7.DD.35 | Hydrohonessite | (Ni1-xFe3+x)(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Woodwardite | Cu1-xAlx(OH)2(SO4)x/2 · nH2O |
| 7.DD.35 | Motukoreaite | Mg6Al3(OH)18[Na(H2O)6][SO4]2 · 6H2O |
| 7.DD.35 | Mountkeithite | [(Mg1-xFe3+x)(OH)2][SO4]x/2 · nH2O |
| 7.DD.40 | Lawsonbauerite | (Mn2+,Mg)9Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.40 | Torreyite | (Mg,Mn2+)7◻2Mn2+2Zn4(SO4)2(OH)22 · 8H2O |
| 7.DD.40 | Isselite | Cu6(SO4)(OH)10(H2O)4 · H2O |
| 7.DD.45 | Mooreite | Mg9◻2Mn2Zn4(SO4)2(OH)26 · 8H2O |
| 7.DD.45 | Hodgesmithite | (Cu,Zn)6Zn(SO4)2(OH)10 · 3H2O |
| 7.DD.47 | Lahnsteinite | Zn4(SO4)(OH)6 · 3H2O |
| 7.DD.50 | Namuwite | Zn4(SO4)(OH)6 · 4H2O |
| 7.DD.50 | Minohlite | (Cu,Zn)7(SO4)2(OH)10 · 8H2O |
| 7.DD.52 | Lauraniite | Cu6Cd2(SO4)2(OH)12 · 5H2O |
| 7.DD.55 | Bechererite | Zn7Cu(OH)13[(SiO(OH)3(SO4)] |
| 7.DD.60 | Ramsbeckite | (Cu,Zn)15(SO4)4(OH)22 · 6H2O |
| 7.DD.65 | Vonbezingite | Ca6Cu3(SO4)3(OH)12 · 2H2O |
| 7.DD.70 | Redgillite | Cu6(SO4)(OH)10 · H2O |
| 7.DD.75 | Nickelalumite | NiAl4(SO4)(OH)12(H2O)3 |
| 7.DD.75 | Kyrgyzstanite | ZnAl4(SO4)(OH)12 · 3H2O |
| 7.DD.75 | Chalcoalumite | CuAl4(SO4)(OH)12 · 3H2O |
| 7.DD.80 | Schulenbergite | (Cu,Zn)7(SO4)2(OH)10 · 3H2O |
| 7.DD.80 | 'UM1992-30-SO:CCuHZn' | (Zn,Cu)7(SO4,CO3)2(OH)10 · 3H2O |
| 7.DD.80 | Thérèsemagnanite | NaCo4(SO4)(OH)6Cl · 6H2O |
| 7.DD.80 | Guarinoite | Zn6(SO4)(OH)10 · 5H2O |
| 7.DD.85 | Montetrisaite | Cu6(SO4)(OH)10 · 2H2O |
Fluorescence of Asagiite
non-fluorescent
Other Information
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 Asagiite
mindat.org URL:
https://www.mindat.org/min-470431.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
Casteel Mine, Bixby, Iron County, Missouri, USA