Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Mieite-(Y) from
Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan


03094390017754696668895.jpg
Mieite-(Y)

Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan
03094390017754696668895.jpg
Mieite-(Y)

Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan
07512660017752224467975.jpg
Mieite-(Y)

Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan
Locality type:Alluvials
Classification
Species:Mieite-(Y)
Formula:Y4Ti(SiO4)2O[F,(OH)]6
Comments:First described under the name as Yfitisite by Matsubara et al 2014. The chemical and XRD studies indicated that it is identical with yftisite from Kola Peninsula, Russia (Pletneva, et al., 1971). Since no there is no valid type specimen of ‘yftisite’ to be re–examined for the re–defination and comparison, the mineral from this pegmatite was used for a re-definition of the phase, approved by IMA (20014-020) and given the name Mieite-(Y).
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Mieite-(Y) data
Locality Data:Click here to view Unnamed pegmatite, Yunoyama-onsen, Komono town, Mie District, Mie Prefecture, Japan
Data Identifiers
Mindat Occurrence Record ID:906768
Long-form Identifier:1:3:906768:4
GUID (UUID V4):0
References
Matsubara, Satoshi, Miyawaki, Ritsuro, Yokoyama, Kazumi, Shigeoka, Masako, Momma, Koichi, Yamamoto, Sadaoki (2014) Magnesiorowlandite–(Y), Y4(Mg,Fe)(Si2O7)2F2, a new mineral in a pegmatite at Souri Valley, Komono, Mie Prefecture, central Japan. Journal of Mineralogical and Petrological Sciences, 109 (3) 109-117 doi:10.2465/jmps.131126
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
 
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