Niobium Crystal (Tube)
From(the seller): canyue & wowotou三点 测娇Niobium crystals prepared by molten salt electrolysis method. Unlike other niobium samples, this niobium sample is in the shape of a hollow tube. This is because the niobium crystal of this sample was deposited on the niobium wire (while most niobium crystals were deposited on thin sheets)
