Jimboite
Jimboite is a rare borate mineral with the chemical formula Mn^2⁺3[BO3]2. It belongs to the orthorhombic crystal system and is classified under the Strunz classification as 6.AA.35. This mineral exhibits a Mohs hardness of 5.5, making it relatively soft for a borate. It has a moderate density and a vitreous luster, with a color that is typically variable depending on impurities. Jimboite is part of the borate mineral group, which is known for its complex anionic structures and diverse chemical compositions.
Overview
Jimboite is a rare borate mineral with the chemical formula Mn^2⁺3[BO3]2. It belongs to the orthorhombic crystal system and is classified under the Strunz classification as 6.AA.35. This mineral exhibits a Mohs hardness of 5.5, making it relatively soft for a borate. It has a moderate density and a vitreous luster, with a color that is typically variable depending on impurities. Jimboite is part of the borate mineral group, which is known for its complex anionic structures and diverse chemical compositions.
Etymology
Jimboite is named after Jinbo Kotora. The mineral was approved by the International Mineralogical Association (IMA) but no specific discovery year is provided in the facts.
How to recognize it
Jimboite can be identified by its Mohs hardness of 5.5, which is relatively soft for a borate mineral. Its color may vary, so a color test is not reliable for identification. A streak test may help if the mineral is powdered. Due to its moderate density and vitreous luster, it can be distinguished from other borates with similar appearances, though specific confusions are not detailed in the facts.
Trivia
Jimboite is notable for its unique chemical formula, which includes manganese in the +2 oxidation state. It belongs to the orthorhombic crystal system, which is less common among borates. The mineral is named after Jinbo Kotora, a person likely associated with its discovery or study, though no further details are provided.