Chemistry:Yugawaralite
| Yugawaraite | |
|---|---|
 | |
| General | |
| Category | 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]
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 (state) , 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 "Yugawaralite Value, Price, and Jewelry Information" (in en). 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
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