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・ Niobium alloy
・ Niobium bromide
・ Niobium capacitor
・ Niobium carbide
・ Niobium chloride
・ Niobium dioxide
・ Niobium monoxide
・ Niobium nanowire
・ Niobium nitride
・ Niobium oxide
・ Niobium oxychloride
・ Niobium pentaiodide
・ Niobium pentoxide
・ Niobium triselenide
・ Niobium(IV) chloride
Niobium(IV) fluoride
・ Niobium(V) bromide
・ Niobium(V) chloride
・ Niobium(V) ethoxide
・ Niobium(V) fluoride
・ Niobium-germanium
・ Niobium-tin
・ Niobium-titanium
・ Niobocene dichloride
・ Niobrara
・ Niobrara ambersnail
・ Niobrara County High School
・ Niobrara County School District Number 1
・ Niobrara County, Wyoming
・ Niobrara Formation


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Niobium(IV) fluoride : ウィキペディア英語版
Niobium(IV) fluoride

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Niobium(IV) fluoride is a chemical compound with the formula NbF4; it is a nonvolatile black solid. It absorbs vapor strongly. It turns into NbO2F in moist air. NbF4 reacts with water to form a brown solution and a brown precipitate whose components are unknown. It is stable between 275 °C and 325 °C when heated in a vacuum. However, it disproportionates at 350 °C rapidly to form niobium(V) fluoride and niobium(III) fluoride:
:\mathrm(at 350 °C)
== References ==



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