Taneyamalite
A valid IMA mineral species
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About Taneyamalite
Formula:
(Na,Ca)Mn2+12(Si,Al)12(O,OH)44
Colour:
Greenish-grey-yellow
Lustre:
Vitreous
Hardness:
5 - 6
Specific Gravity:
3.30
Crystal System:
Triclinic
Member of:
Name:
Named for the Taneyama Mine, Toyo village, Kumamoto Prefecture, Japan, a co-type locality.
This page provides mineralogical data about Taneyamalite.
Unique Identifiers
Mindat ID:
3880
Long-form identifier:
mindat:1:1:3880:1
IMA Classification of Taneyamalite
Approved
Approval year:
1977
First published:
1981
Classification of Taneyamalite
9.DH.65
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
69.2.3.2
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
69 : INOSILICATES Chains with Side Branches or Loops
2 : Chains with Side Branches or Loops with P>2
16.16.16
16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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 |
|---|---|---|
| Tny | 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 Taneyamalite
Vitreous
Transparency:
Translucent
Colour:
Greenish-grey-yellow
Streak:
Light yellow
Hardness:
5 - 6 on Mohs scale
Cleavage:
Perfect
Perfect to good on (010), fair on (100).
Perfect to good on (010), fair on (100).
Density:
3.30 g/cm3 (Measured) 3.30(4) g/cm3 (Calculated)
Optical Data of Taneyamalite
Type:
Biaxial (-)
RI values:
nα = 1.646 - 1.697 nβ = 1.664 - 1.720 nγ = 1.676 - 1.732
2V:
Measured: 70° , Calculated: 70° to 76°
Max. Birefringence:
δ = 0.030 - 0.035
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:
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 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.
Dispersion:
Relatively strong.
Optical Extinction:
Nearly parallel.
Pleochroism:
Visible
Comments:
α = β = nearly colourless; γ = pale yellow.
Comments:
Absorption: Z > Y >= X.
Elongation positive.
Elongation positive.
Chemistry of Taneyamalite
Mindat Formula:
(Na,Ca)Mn2+12(Si,Al)12(O,OH)44
Element Weights:
Common Impurities:
Ti,Al,Ca,K,H2O
Crystallography of Taneyamalite
Crystal System:
Triclinic
Cell Parameters:
a = 10.193(5) Å, b = 9.792(32) Å, c = 9.525(25) Å
α = 90.5°, β = 70.53°, γ = 108.57°
α = 90.5°, β = 70.53°, γ = 108.57°
Ratio:
a:b:c = 1.041 : 1 : 0.973
Unit Cell V:
844.59 ų (Calculated from Unit Cell)
Z:
1
Comment:
Point Group: 1 or 1; Space Group: P1 or P1.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.155 Å | (100) |
| 3.252 Å | (37) |
| 2.774 Å | (24) |
| 7.948 Å | (22) |
| 2.202 Å | (21) |
| 2.665 Å | (18) |
| 3.067 Å | (17) |
Comments:
Aoki et al. (1981) give quite different data.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 39 : High-? metamorphism (blueschist, eclogite, ultrahigh ? facies) | |
| 40 : Regional metamorphism (greenschist, amphibolite, granulite facies) |
Type Occurrence of Taneyamalite
Co-Type Localities:
General Appearance of Type Material:
Filling small seams and fissures in caryopilite and quartz-hematite.
Place of Conservation of Type Material:
Department of Geology, Kyushu University, Hakozaki; Sakurai Museum, Tokyo; National Science Museum, Tokyo, Japan; National Museum of Natural History, Washington, D.C., USA, 142945.
Geological Setting of Type Material:
Metamorphic manganese ore.
Associated Minerals at Type Locality:
Synonyms of Taneyamalite
Other Language Names for Taneyamalite
Relationship of Taneyamalite to other Species
Member of:
Other Members of Deerite-Howieite Group:
| Deerite | Fe2+6Fe3+3(Si6O17)O3(OH)5 | Mon. 2/m : P21/b |
| Howieite | Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10 | Tric. 1 : P1 |
| Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 | Tric. |
Related Minerals - Strunz-mindat Grouping
| 9.DH. | Devilliersite | Ca4Ca2Fe3+10O4[(Fe3+10Si2)O36] |
| 9.DH. | 'Gageite-2M' | (Mn,Mg,Zn)42Si16O54(OH)40 |
| 9.DH. | Bavsiite | Ba2V2O2[Si4O12] |
| 9.DH. | Yuzuxiangite | Sr3Fe3+(Si2O6)2(OH) · 3H2O |
| 9.DH. | Louisfuchsite | Ca2(Mg4Ti2)(Al4Si2)O20 |
| 9.DH.05 | Leucophanite | NaCaBeSi2O6F |
| 9.DH.10 | Ohmilite | Sr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2O |
| 9.DH.15 | Haradaite | SrVSi2O7 |
| 9.DH.15 | Suzukiite | BaVSi2O7 |
| 9.DH.20 | Shcherbakovite | (K,Ba)KNa(Ti,Nb)2(Si4O12)O2 |
| 9.DH.20 | Batisite | BaNaNaTi2(Si4O12)O2 |
| 9.DH.20 | Noonkanbahite | BaKNaTi2(Si4O12)O2 |
| 9.DH.25 | Taikanite | Sr3BaMn2+2(Si4O12)O2 |
| 9.DH.30 | Krauskopfite | BaSi2O5 · 3H2O |
| 9.DH.35 | Gageite | Mn21(Si4O12)2O3(OH)20 |
| 9.DH.35 | Balangeroite | (Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40 |
| 9.DH.40 | Kuratite | Ca2(Fe2+5Ti)O2[Si4Al2O18] |
| 9.DH.40 | Aenigmatite | Na4[Fe2+10Ti2]O4[Si12O36] |
| 9.DH.40 | Dorrite | Ca4(Mg3Fe3+9)O4(Si3Al8Fe3+O36) |
| 9.DH.40 | Serendibite | Ca4[Mg6Al6]O4[Si6B3Al3O36] |
| 9.DH.40 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] |
| 9.DH.40 | Khesinite | Ca4(Mg3Fe3+9)O4(Fe3+9Si3)O36 |
| 9.DH.40 | 'UM1991-29-SiO:FeMgNa' | Na4(Mg5Fe3+7)O4[Si9Fe3+3O36] |
| 9.DH.40 | Høgtuvaite | Ca4[Fe2+6Fe3+6]O4[Si8Be2Al2O36] |
| 9.DH.40 | 'Leucorhönite' | Ca2(Mg,Fe3+,Al)6(Si,Al)6O20 |
| 9.DH.40 | Welshite | Ca4Mg9Sb3O4[Si6Be3AlFe2O36] |
| 9.DH.40 | Wilkinsonite | Na2Fe2+4Fe3+2(Si6O18)O2 |
| 9.DH.40 | Krinovite | Na2Mg4Cr3+2(Si6O18)O2 |
| 9.DH.40 | Makarochkinite | (Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36] |
| 9.DH.45 | Sapphirine | Mg4(Mg3Al9)O4[Si3Al9O36] |
| 9.DH.50 | Khmaralite | (Mg,Al,Fe)16[(Al,Si,Be)12O36]O4 |
| 9.DH.55 | 'UM1988-26-SiO:AlMg' | Mg4Al2O[Si3Al2O15] |
| 9.DH.55 | Surinamite | (Mg,Fe)3Al4BeSi3O16 |
| 9.DH.60 | Deerite | Fe2+6Fe3+3(Si6O17)O3(OH)5 |
| 9.DH.65 | Howieite | Na(Fe2+,Fe3+,Al,Mg)12(Si6O17)2(O,OH)10 |
| 9.DH.70 | Johninnesite | Na2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2 |
| 9.DH.75 | Agrellite | NaCa2Si4O10F |
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 Taneyamalite
mindat.org URL:
https://www.mindat.org/min-3880.html
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Please feel free to link to this page.
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References for Taneyamalite
Reference List:
AOKI, Yoshikazu, AKASAKO, Hideo, ISHIDA, Kiyotaka (1981) Taneyamalite, a new manganese silicate mineral from the Taneyama mine, Kumamoto Prefecture, Japan. Mineralogical Journal, 10 (8) 385-395 doi:10.2465/minerj.10.385
Matsubara, Satoshi (1981) Taneyamalite, (Na,Ca)(Mn2+,Mg,Fe3+,Al)12Si12(O,OH)44, a new mineral from the Iwaizawa mine, Saitama Prefecture, Japan. Mineralogical Magazine, 44 (333). 51-53 doi:10.1180/minmag.1981.44.333.06
Localities for Taneyamalite
Showing 5 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Japan | |
| Minakawa et al. (2008) |
| AOKI et al. (1981) |
| Matsubara (1981) |
USA | |
| Analysis in: DHZ |
| Huebner +6 other references |
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Taneyama mine, Toyo, Yatsushiro City, Kumamoto Prefecture, Japan