Kaersutite is a mineral discovered in 1913 and it belongs to the Amphibole Group. The spelling of the word "kaersutite" is pronounced as /ˈkɛərsjuːtaɪt/ which means the first syllable is "kair", and the second syllable is "soo". The IPA phonetic transcription helps us understand the sounds of letters in the word without requiring extensive knowledge of the language. This mineral is commonly found in volcanic rocks, and its name is derived from the Kaersut fjord in Greenland where the first specimens were collected.
Kaersutite is a rare and specific mineral belonging to the amphibole group. It is a complex silicate with a general formula of (Ca,Na)(Mg,Fe2+,Fe3+)(Al,Ti,Fe3+)(Si,Al)2O6. This mineral is classified as a member of the sodic-calcic subgroup, characterized by a sodium-calcium-iron-magnesium combination. Kaersutite gets its name from the locality where it was first discovered, the Kaersut fjord in Greenland.
Physically, kaersutite typically occurs in various shades of black or green, with a vitreous to dull luster. It has a hardness range of 5 to 6 on the Mohs scale, making it relatively durable. Additionally, it forms prismatic to acicular crystals, which are often found in aggregates or as granular masses. Its crystal structure exhibits a monoclinic system, with well-defined cleavage and a relatively high density.
In terms of its geographical occurrence, kaersutite is mainly found in alkali-rich volcanic rocks, such as kimberlites and lamproites. These rocks are commonly associated with mantle-derived magmas and are typically formed in explosive volcanic activities. Specifically, kaersutite is more likely to occur in ultrapotassic (SiO2-depleted) rocks, indicating its affinity for silica-undersaturated environments.
The presence of kaersutite can provide important information about the mineralogy, petrology, and evolution of igneous rocks. Its specific chemical composition and physical properties distinguish it from other amphibole minerals, allowing for identification and characterization in scientific research and geological investigations.
The word "kaersutite" is derived from the minerals "kaer" and "sutite", which make up this specific mineral species. However, it is important to note that "kaersutite" itself does not have a separate etymology as it is a mineral name that combines these two components.