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Mieite-(Y)
A valid IMA mineral species
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About Mieite-(Y)
Mie prefecture, Japan
Formula:
Y4Ti(SiO4)2O[F,(OH)]6
Colour:
Pale amber yellow
Lustre:
Adamantine
Hardness:
6
Specific Gravity:
4.61 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for Mie prefecture, Japan, that includes the type locality. The suffix indicates the dominant rere-earth element.
Unique Identifiers
Mindat ID:
46143
Long-form identifier:
mindat:1:1:46143:8
Similar Names
IMA Classification of Mieite-(Y)
Approved
IMA Formula:
Y4Ti4+(SiO4)2O[F,(OH)]6
Approval year:
2014
First published:
2015
Type description reference:
Miyawaki, Ritsuro, Matsubara, Satoshi, Yokoyama, Kazumi, Shigeoka, Masako, Momma, Koichi, Yamamoto, Sadaoki (2015) Mieite–(Y), Y4Ti(SiO4)2O[F,(OH)]6, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 110 (3) 135-144 doi:10.2465/jmps.150106
Classification of Mieite-(Y)
9.AG.25
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
G : Nesosilicates with additional anions; cations in > [6] +- [6] coordination
52.4.4.3
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
4 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
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 |
|---|---|---|
| Mi-Y | 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 Mieite-(Y)
Adamantine
Transparency:
Transparent
Colour:
Pale amber yellow
Streak:
White
Hardness:
6 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
4.61 g/cm3 (Calculated)
Optical Data of Mieite-(Y)
Type:
Biaxial
RI values:
nα = 1.694(2) nγ = 1.715(5)
Max. Birefringence:
δ = 0.021
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:
Moderate
Pleochroism:
Non-pleochroic
Comments:
anomalous blue interference colors
Chemistry of Mieite-(Y)
Mindat Formula:
Y4Ti(SiO4)2O[F,(OH)]6
Element Weights:
Crystallography of Mieite-(Y)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Cmcm
Setting:
Cmcm
Cell Parameters:
a = 14.942(2) Å, b = 10.633(2) Å, c = 7.0365(8) Å
Ratio:
a:b:c = 1.405 : 1 : 0.662
Unit Cell V:
1100.3 ų
Z:
4
Comment:
From raw - not annealed material.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0015895 | Mieite-(Y) | Balko V P, Bakakin V V (1975) Crystal-structure of natural yttrium and rare-earth fluorotitano-silicate (Y,Ree)4(F,OH)6TiO[SiO4]2 (yftisite) Zhurnal Strukturnoi Khimii 16 837-842 | 1975 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.46 Å | (60) |
| 4.26 Å | (70) |
| 3.76 Å | (90) |
| 3.54 Å | (80) |
| 3.48 Å | (80) |
| 2.68 Å | (100) |
| 2.43 Å | (50) |
| 2.16 Å | (80) |
Reference:
Miyawaki, Ritsuro, Matsubara, Satoshi, Yokoyama, Kazumi, Shigeoka, Masako, Momma, Koichi, Yamamoto, Sadaoki (2015) Mieite–(Y), Y4Ti(SiO4)2O[F,(OH)]6, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 110 (3) 135-144 doi:10.2465/jmps.150106
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Mieite-(Y)
General Appearance of Type Material:
Amber yellow mass about 1cm.
Place of Conservation of Type Material:
Type material is deposited in the collections of the National Museum of Nature and Science, Amakubo, Tsukuba, Ibaraki, Japan, registration number NSM-M43627
Geological Setting of Type Material:
Pegmatite
Reference:
Miyawaki, Ritsuro, Matsubara, Satoshi, Yokoyama, Kazumi, Shigeoka, Masako, Momma, Koichi, Yamamoto, Sadaoki (2015) Mieite–(Y), Y4Ti(SiO4)2O[F,(OH)]6, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 110 (3) 135-144 doi:10.2465/jmps.150106
Synonyms of Mieite-(Y)
Other Language Names for Mieite-(Y)
Dutch:Mieiet-(Y)
German:Mieit-(Y)
Common Associates
Associations Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 9.AG. | Aluminotaipingite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4F3 |
| 9.AG. | 'Ivanyukite-Na-T' | Na2Ti4(SiO4)3(OH)O3 · 7H2O |
| 9.AG. | 'Ivanyukite-Na-C' | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG. | Edgrewite | Ca9(SiO4)4F2 |
| 9.AG.02 | Gatedalite | ZrMn2+2Mn3+4SiO12 |
| 9.AG.05 | Abswurmbachite | CuMn3+6(SiO4)O8 |
| 9.AG.05 | Neltnerite | CaMn3+6(SiO4)O8 |
| 9.AG.05 | Skogbyite | Zr(Mg2Mn3+4)SiO12 |
| 9.AG.05 | Braunite | Mn2+Mn3+6(SiO4)O8 |
| 9.AG.05 | 'Braunite-II' | Ca(Mn3+,Fe)14(SiO4)O20 |
| 9.AG.10 | Långbanite | Mn2+4Mn3+9Sb5+O16(SiO4)2 |
| 9.AG.12 | Taipingite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3[SiO3(OH)]4F3 |
| 9.AG.15 | Żabińskiite | Ca[Al0.5(Ta,Nb)0.5)]O(SiO4) |
| 9.AG.15 | Titanite | CaTiO(SiO4) |
| 9.AG.15 | Vanadomalayaite | CaVO(SiO4) |
| 9.AG.15 | Natrotitanite | (Na0.5Y0.5)TiO(SiO4) |
| 9.AG.15 | Malayaite | CaSnO(SiO4) |
| 9.AG.20 | Ferricerite-(LaCa) | (La6Ca3)◻Fe3+(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Aluminocerite-(CeCa) | (Ce6Ca3)◻Al(SiO4)3[SiO3(OH)]4(OH)3 |
| 9.AG.20 | Cerite-(CeCa) | (Ce7Ca2)◻Mg(SiO4)3(SiO3OH)4(OH)3 |
| 9.AG.20 | Nipeiite-(Ce) | Ce9Fe3+(SiO4)6[SiO3(OH)](OH)3 |
| 9.AG.25 | 'Yftisite-(Y)' | (Y,Dy,Er)4(Ti,Sn)(SiO4)2O(F,OH)6 |
| 9.AG.25 | Trimounsite-(Y) | Y2Ti2(SiO4)O5 |
| 9.AG.30 | Sitinakite | KNa2Ti4(SiO4)2O5(OH) · 4H2O |
| 9.AG.35 | Kittatinnyite | Ca2Mn2Mn(SiO4)2(OH)4 · 9H2O |
| 9.AG.40b | Paranatisite | Na2Ti(SiO4)O |
| 9.AG.40a | Natisite | Na2Ti(SiO4)O |
| 9.AG.45 | Törnebohmite-(Ce) | Ce2Al(SiO4)2(OH) |
| 9.AG.45 | Törnebohmite-(La) | La2Al(SiO4)2(OH) |
| 9.AG.50 | Ivanyukite-Na | Na2Ti4(SiO4)3(OH)2O2 · 6H2O |
| 9.AG.50 | Ivanyukite-K | K2Ti4(SiO4)3(OH)2O2 · 9H2O |
| 9.AG.50 | Ivanyukite-Cu | CuTi4(SiO4)3(OH)2O2 · 7H2O |
| 9.AG.50 | Kuliokite-(Y) | Y4Al(SiO4)2(OH)2F5 |
| 9.AG.50 | Hydroxyledgrewite | Ca9(SiO4)4(OH)2 |
| 9.AG.52 | Ulfanderssonite-(Ce) | (Ce15Ca)Σ16Mg2(SiO4)10(SiO3OH)(OH,F)5Cl3 |
| 9.AG.55 | Chantalite | CaAl2(SiO4)(OH)4 |
| 9.AG.60 | Vuagnatite | CaAl(SiO4)(OH) |
| 9.AG.60 | Mozartite | CaMn3+(SiO4)(OH) |
| 9.AG.65 | Hatrurite | Ca3(SiO4)O |
| 9.AG.70 | Jasmundite | Ca11(SiO4)4O2S |
| 9.AG.75 | Afwillite | Ca3[SiO4][SiO2(OH)2] · 2H2O |
| 9.AG.80 | Bultfonteinite | Ca2(HSiO4)F · H2O |
| 9.AG.85 | Zoltaiite | BaV4+2V3+12(SiO4)2O19 |
| 9.AG.90 | Tranquillityite | (Fe2+,Ca)8(Zr,Y)2Ti3(SiO4)3O12 |
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 Mieite-(Y)
mindat.org URL:
https://www.mindat.org/min-46143.html
Please feel free to link to this page.
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References for Mieite-(Y)
Reference List:
Miyawaki, Ritsuro, Matsubara, Satoshi, Yokoyama, Kazumi, Shigeoka, Masako, Momma, Koichi, Yamamoto, Sadaoki (2015) Mieite–(Y), Y4Ti(SiO4)2O[F,(OH)]6, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 110 (3) 135-144 doi:10.2465/jmps.150106
Localities for Mieite-(Y)
Showing 1 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 (TL) | |
| Matsubara et al. (2014) +1 other reference |
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Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan