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Wiserite
Robert M. Lavinsky·CC BY-SA 3.0·Wikimedia

Wiserite

Mn214(B2O5)4(OH)8·(Si,Mg)(O,OH)4Cl
Tetragonal IMA grandfathered

Wiserite is a rare borosilicate mineral with the chemical formula Mn^2⁺14(B2O5)4(OH)8·(Si,Mg)(O,OH)4Cl. It belongs to the tetragonal crystal system and is classified under the Strunz system as 6.BA.20 and the Dana system as 27.1.10.1. The mineral is characterized by its complex composition, which includes manganese, boron, oxygen, silicon, magnesium, and chlorine. It typically exhibits a dull to vitreous luster and is known for its relatively low hardness and moderate density. Wiserite is part of the broader group of borosilicates, which are minerals containing both boron and silicon in their structures.

Composition

Composizione (% in peso)
O
B
Mn
  • OOxygen70.6%
  • BBoron11.9%
  • MnManganese7.6%
  • ClChlorine4.9%
  • SiSilicon3.9%
  • HHydrogen1.1%

Overview

Wiserite is a rare borosilicate mineral with the chemical formula Mn^2⁺14(B2O5)4(OH)8·(Si,Mg)(O,OH)4Cl. It belongs to the tetragonal crystal system and is classified under the Strunz system as 6.BA.20 and the Dana system as 27.1.10.1. The mineral is characterized by its complex composition, which includes manganese, boron, oxygen, silicon, magnesium, and chlorine. It typically exhibits a dull to vitreous luster and is known for its relatively low hardness and moderate density. Wiserite is part of the broader group of borosilicates, which are minerals containing both boron and silicon in their structures.

Etymology

Wiserite is named after David Friedrich Wiser, a notable figure in mineralogy. The mineral was recognized with a grandfathered IMA status, indicating its historical acceptance prior to the formal IMA approval process.

How to recognize it

Wiserite can be identified through its tetragonal crystal system and chemical composition. It has a relatively low hardness on the Mohs scale, though the exact value is not specified. The mineral typically exhibits a dull to vitreous luster and a range of colors depending on impurities. Its density is moderate, and it can be distinguished from similar minerals through its unique chemical formula and crystal structure. Common confusions may arise with other borosilicate minerals, but the presence of manganese and chlorine in its composition helps in differentiation.

Trivia

Wiserite is notable for its complex chemical formula, which includes multiple elements such as manganese, boron, silicon, and chlorine. Its classification under the Strunz and Dana systems highlights its unique position among borosilicates. The mineral is also recognized for its tetragonal crystal system, which is relatively uncommon among borosilicates. These characteristics make wiserite a subject of interest for mineralogical research.

Frequently asked questions

Wiserite is considered a rare mineral, typically found in limited localities, and is not commonly encountered in commercial mineral collections.