Yagiite is a rare mineral that belongs to the selenate group. The word is pronounced [ˈjæɡiːaɪt] and is spelled as "yagi" followed by the suffix "-ite," which denotes a mineral. The first part of the word comes from the surname of Japanese scientist Hidetsugu Yagi, who was known for his work on antenna design. The mineral was named in his honor by its discoverer, Russian mineralogist Victor Yakovenchuk, in 2017. Yagiite has only been found in one location in Russia, making it a highly sought-after mineral specimen for collectors.
Yagiite is a mineral that belongs to the chemical class of sulfides and selenides. It is specifically classified as a rare telluride mineral containing the elements lead (Pb), gold (Au), and silver (Ag). The name "yagiite" is derived from its discovery in the Yagi mine located in Nagano Prefecture, Japan.
Yagiite typically occurs as small, metallic, and often wedge-shaped crystals. It commonly forms in the silver-rich portions of hydrothermal ore veins associated with other telluride minerals. The color of yagiite ranges from a silvery-white to a pale yellow hue, with a metallic luster. However, it is important to note that yagiite can tarnish and develop an iridescent patina upon exposure to air.
In terms of physical properties, yagiite is known for its high density and relative hardness. It has a density of about 9.21 grams per cubic centimeter and falls within the range of 2.5 to 3 on the Mohs scale of mineral hardness. The mineral also demonstrates a brittle tenacity and leaves a dark gray streak when rubbed against a hard surface.
Due to its rarity and limited occurrence, yagiite holds relatively low significance within the industrial and commercial sectors. Instead, it is primarily valued by mineral collectors and researchers studying the geology and formation of telluride minerals.