Chlorothionite is a mineral containing chlorine, sulfur, oxygen, and sodium. The spelling of chlorothionite is based on its chemical composition. The "chloro" (klɔroʊ) comes from chlorine, "thion" (θaɪa̯n) comes from sulfur, and "ite" (aɪt) is a common suffix for minerals. Therefore, chlorothionite is pronounced as kluh-roh-THAHY-uh-nite using IPA phonetic transcription. This mineral is found in volcanic environments and often occurs with other sulfate minerals. Chlorothionite has a bright yellow color and was first discovered in 1934 in Japan.
Chlorothionite is a mineral that belongs to the halide family and exhibits its distinct characteristics. It is typically found in the form of yellow or greenish-yellow crystals, which are translucent to transparent. The mineral's chemical composition consists of sulfur, chlorine, and oxygen, with the molecular formula being S4O6Cl2.
Chlorothionite is commonly found in volcanic fumaroles and hydrothermal veins, often accompanying other minerals such as sulfur, sulfuric acid, and native sulfur. It has a relatively low hardness on the Mohs scale, ranging from 2 to 3, and can be easily scratched by a fingernail. The mineral also possesses a brittle tenacity, meaning it can break or crumble when subjected to pressure.
One notable physical property of chlorothionite is its color, which can vary from pale yellow to greenish-yellow. Its streak, or the color left on a porcelain streak plate when scraped, is a light yellow. The mineral has a vitreous to resinous luster, which gives it a shiny, glass-like appearance.
Chlorothionite is not widely known outside of geological and mineralogical circles due to its rarity and limited use. Nevertheless, it remains an intriguing and sought-after mineral by collectors and scientists alike. Its distinct chemical composition, crystal structure, and unique coloration contribute to its recognition as a notable and captivating mineral.
The word "chlorothionite" is derived from the combination of two parts: "chloro-" and "-thionite".
The prefix "chloro-" indicates the presence of chlorine in a compound. It is derived from the Ancient Greek "khlōros", meaning greenish-yellow. Chlorine is a halogen element with the symbol Cl.
The suffix "-thionite" is derived from the compound "thionous acid", which is an unstable compound with the formula H2S2O2. It is derived from the Greek word "theios", meaning divine or sulphur, as it is a compound containing sulphur.
Therefore, "chlorothionite" can be understood as a compound containing chlorine and related to or derived from thionous acid.