Chemistry:Yugawaralite
| Yugawaraite | |
|---|---|
 | |
| General | |
| Category | Tectosilicate minerals, zeolite group |
| Formula (repeating unit) | CaAl2Si6O16 · 4H2O |
| Crystal system | Monoclinic |
| Identification | |
| Color | Colorless, pink, or white |
| Cleavage | Poor, indistinct |
| Tenacity | Very brittle |
| Mohs scale hardness | 4.5-5 |
| |re|er}} | Vitreous, pearly |
| Streak | White |
| References | [1] |
Yugawaralite is a clear or pinkish mineral of the zeolite group.[1][2] It was first described by Sakurai and Hayashi (1952) near a waterfall by some hot springs near Yugawara.[3]
Etymology
Yugawaralite is named after the town Yugawara, where it was found.[1]
Properties
Yugawaralite is piezoelectric and pyroelectric.[2]
Location
Yugawaralite is found in geothermally active areas such as Japan.[4] In Japan, yugawaralite is found on Honshu, where Yugawara is the type locality. In India, it is found in small amounts. Other locations where it has been found is Washington, Alaska, Yellowstone National Park, British Columbia, Iceland, Sardinia, and Reunion island.[2]
Alaska
In Alaska, yugawaralite is found about 40 miles (64 km) east of Fairbanks, Alaska. In this site, yugawaralite has been recorded up to 8 millimetres (0.31 in) long.[3]
Japan
In Yugawara, the crystals are found at Fudō Falls in a layer of the Neogene.[5]
References
- ↑ 1.0 1.1 1.2 "Yugawaralite". https://www.mindat.org/min-4376.html.
- ↑ 2.0 2.1 2.2 Arem, Joel E. (2018-08-15). "Yugawaralite Value, Price, and Jewelry Information". https://www.gemsociety.org/article/yugawaralite-jewelry-and-gemstone-information/.
- ↑ 3.0 3.1 Eberlein, G. Donald; Erd, R.C.; Weber, Florence; Beatty, L.B. (1971). "New Occurrence OF Yugawaralite from the Chena Hot Springs Area, Alaska". The American Mineralogist 56 (September–October 1971). http://www.minsocam.org/ammin/AM56/AM56_1699.pdf. Retrieved 5 August 2022.
- ↑ "Yugawaralite". Mineral Data Publishing. 2001. https://rruff.info/doclib/hom/yugawaralite.pdf.
- ↑ "天然記念物 - 四季彩のまち湯河原公式ホームページ" (in ja). https://www.town.yugawara.kanagawa.jp/soshiki/24/2551.html.
External links
 |  |
