| 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 |
| Luster | 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]
Yugawaralite is named after the town Yugawara, where it was found. [1]
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]
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]
In Yugawara, the crystals are found at Fudō Falls in a layer of the Neogene. [5]
Obsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock.
Cinnabar, or cinnabarite, is the bright scarlet to brick-red form of mercury(II) sulfide (HgS). It is the most common source ore for refining elemental mercury and is the historic source for the brilliant red or scarlet pigment termed vermilion and associated red mercury pigments.
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A hot spring, hydrothermal spring, or geothermal spring is a spring produced by the emergence of geothermally heated groundwater onto the surface of the Earth. The groundwater is heated either by shallow bodies of magma or by circulation through faults to hot rock deep in the Earth's crust. In either case, the ultimate source of the heat is the radioactive decay of naturally occurring radioactive elements in the Earth's mantle, the layer beneath the crust.
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Beitou District is the northernmost of the twelve districts of Taipei City, Taiwan. The historical spelling of the district is Peitou. The name originates from the Ketagalan word Kipatauw, meaning witch. Beitou is the most mountainous and highest of Taipei's districts, encompassing a meadow with rivers running through the valley which have abundant steam rising from them; the result of geothermal warming. The valley is often surrounded by mist shrouding the trees and grass. Beitou is famous for its hot springs. In March 2012, it was named one of the Top 10 Small Tourist Towns by the Tourism Bureau of Taiwan.
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Yugawara is a town located in Ashigarashimo District, Kanagawa Prefecture, Japan. As of 1 May 2021, the town had an estimated population of 23,267 and a population density of 570 persons per km2. The total area of the town is 40.99 square kilometres (15.83 sq mi).
Chena Hot Springs are a system of thermal mineral springs located within the Yukon-Tanana Plateau near the town of Chena Hot Springs, approximately 50 miles northeast of Fairbanks, Alaska.
