SELLAITE Meaning and
Definition
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Sellaite is a naturally occurring mineral that belongs to the fluorite mineral group. Its chemical formula is MgF2, indicating that it consists of magnesium and fluoride ions. The mineral typically forms in hydrothermal veins and is commonly found associated with other minerals such as quartz, topaz, and fluorite.
Sellaite is characterized by its distinct crystal structure, which is usually occurring as transparent, colorless to white prismatic crystals. It boasts a high refractive index and a vitreous to pearly luster, giving it a remarkable appearance. It also exhibits perfect cleavage in two directions, making it easy to break or split along these planes.
This mineral derives its name from the locality it was first discovered, namely the Sella Island in Langesundsfjorden, Norway. Its occurrence is not widespread, as it is a relatively rare mineral, but it has been found in a few other locations around the world, including Sweden, Russia, and the United States.
Although sellaite is not considered a commercially important mineral, its unique properties make it prized by collectors. Its appearance and occurrence in association with other beautiful minerals make it sought after for both its beauty and rarity. Studying sellaite and understanding its crystal structure can also provide valuable insights into the geological processes and conditions under which it is formed.
Etymology of SELLAITE
The word "sellaite" has its root in the mineral name "sellaite", which is a type of magnesium fluoride mineral. The term "sellaite" itself was coined in 1903 by the British mineralogist Frank Dawson Adams. It was derived from the word "sellae", which is the Latin plural of "sella", meaning "seat" or "saddle". This name was chosen due to the saddle-shaped crystals often found in this mineral.
