Also known as Pertsevite, a new silicatian magnesioborate mineral with an end-member composition Mg2BO3F, in kotoite marble from east of Verkhoyansk, Sakha-Yakutia, Russia, Pertsevite, a new silicatian magnesioborate mineral with an end-member composition Mg2BO3F,in kotoite marble from east of Verkhoyansk, Sakha-Yakutia, Russia
