Orthite is a rare mineral that belongs to the group of silicates. Its spelling might seem confusing, but it is pronounced as [ˈɔrθaɪt]. The first syllable "orth" is pronounced as "awrth" with a long vowel sound, and the second syllable "ite" is pronounced as "ait" with a short vowel sound. The pronunciation of the word can aid in spelling, helping to remember the two distinct syllables. Orthite was first discovered in 1884 in Sweden, and it's named after the Greek word "orthos", meaning straight or upright.
Orthite is a rare earth mineral belonging to the group of silicate minerals known as epidotes. It is typically found in metamorphic and igneous rocks, commonly associated with other minerals such as feldspar and titanite. The mineral was first discovered and named in 1893 by Axel Hamberg, a Swedish geologist. The name “orthite” was derived from the Greek word "orthos," meaning straight, referring to the typical elongated and prismatic crystal habit of this mineral.
Orthite is characterized by its green to brownish-green coloration, although variations in shade can occur depending on impurities present in the crystal structure. It possesses a vitreous to resinous luster and can exhibit a pleochroic phenomenon, wherein the color of the mineral changes when viewed from different angles. Orthite is known to have a relatively high specific gravity, usually ranging between 3.4 to 4.6.
Chemically, orthite is a complex calcium-iron aluminum silicate mineral with the chemical formula (Ce,Ca)(Al,Fe)[Si2O7](SiO4)(OH). It comprises a solid solution series with respect to rare earth elements and may contain variable amounts of cerium, lanthanum, neodymium, yttrium, and other rare earth metals. This makes orthite an important source of rare earth elements, which are widely used in various modern technologies.
In addition to its scientific importance, orthite possesses ornamental value and can be cut and polished into gemstones. However, due to its rarity and limited supply, it is seldom seen in the commercial gemstone market. Nonetheless, orthite remains highly valued by collectors and mineral enthusiasts worldwide for its unique crystal habit, rich color, and association with other rare
A mineral of a blackish-brown colour, occurring in straight, needle-shaped, or columnar masses in the granites of Scandinavia.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "Orthite" is primarily used as a mineral name. It was named after the Scottish mineralogist Sir William Thomas Blanford (1832-1905), who published a detailed description of this mineral in 1874. The name "Orthite" is derived from the Greek word "orthos", meaning "straight" or "upright", referring to the usually well-formed crystals of this mineral.