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Takanawaite-(Y)

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About Takanawaite-(Y)Hide

Formula:
YTaO4
Colour:
dark brown
Hardness:
Specific Gravity:
6.97 (Calculated)
Crystal System:
Monoclinic
Name:
After the type locality, Mt Takanawa, on Shikoku island, Japan.
M-type polymorph.


Classification of Takanawaite-(Y)Hide

Approved
Approval Year:
2011

Physical Properties of Takanawaite-(Y)Hide

Colour:
dark brown
Hardness:
5½ on Mohs scale
Fracture:
Conchoidal
Density:
6.97 g/cm3 (Calculated)

Chemical Properties of Takanawaite-(Y)Hide

Formula:
YTaO4
Idealised Formula:
YTaO4
Common Impurities:
Nb

Crystallography of Takanawaite-(Y)Hide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 5.3182(7) Å, b = 10.957(1) Å, c = 5.0597(7) Å
β = 94.99(1)°
Ratio:
a:b:c = 0.485 : 1 : 0.462
Unit Cell V:
293.74 ų
Z:
4
Morphology:
Tabular crystals
Comment:
Space group setting: I2/a; partially metamict (submetamict)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
3.133 (100)
2.953 (85)
2.739 (29)
2.649 (21)
1.912 (24)
1.905 (39)
1.855 (26)
1.573 (18)

Type Occurrence of Takanawaite-(Y)Hide

General Appearance of Type Material:
single tabular crystal (up to 5 mm); radial aggregate of fine crystals
Place of Conservation of Type Material:
National Museum of Nature and Science, Tokyo, Japan, specimen number NSM M-43517
Geological Setting of Type Material:
Granitic pegmatites

Synonyms of Takanawaite-(Y)Hide

Other Language Names for Takanawaite-(Y)Hide

Japanese:高縄石

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.

References for Takanawaite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Nishio-Hamane, D., Minakawa, T. and Ohgoshi, Y. (2012) Takanawaite-(Y), IMA 2011-099. CNMNC Newsletter No. 13, June 2012, page 808; Mineralogical Magazine, 76, 807-?817.
Daisuke Nishio-hamane, Tetsuo Minakawa, Yukikazu Ohgoshi (2013) Takanawaite-(Y), a new mineral of the M-type polymorph with Y(Ta,Nb)O4 from Takanawa Mountain, Ehime Prefecture, Japan. Journal of Mineralogical and Petrological Sciences 108:335-344.

Internet Links for Takanawaite-(Y)Hide

Localities for Takanawaite-(Y)Hide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Japan (TL)
 
  • Shikoku Island
    • Ehime Prefecture
      • Matsuyama City
Nishio-Hamane, D., Minakawa, T. and Ohgoshi, Y. (2012) Takanawaite-(Y), IMA 2011-099. CNMNC Newsletter No. 13, June 2012, page 808; Mineralogical Magazine, 76, 807-?817.; Daisuke Nishio-hamane, Tetsuo Minakawa, Yukikazu Ohgoshi (2013) Takanawaite-(Y), a new mineral of the M-type polymorph with Y(Ta,Nb)O4 from Takanawa Mountain, Ehime Prefecture, Japan. Journal of Mineralogical and Petrological Sciences 108:335-344.
Mineral and/or Locality  
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