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columbium oxide

См. также в других словарях:

  • Columbium — Eigenschaften …   Deutsch Wikipedia

  • Niobium — zirconium ← niobium → molybdenum V ↑ Nb ↓ Ta …   Wikipedia

  • Niobium — Eigenschaften …   Deutsch Wikipedia

  • Tantalum — Eigenschaften …   Deutsch Wikipedia

  • Coltan — is the industrial name for columbite–tantalite, a dull black metallic mineral from which the elements niobium (formerly columbium ) and tantalum are extracted. The niobium dominant mineral is columbite, hence the col half of the term. The mineral …   Wikipedia

  • Timeline of chemical elements discoveries — The discovery of the elements known to exist today is presented here in chronological order. The elements are listed generally in the order in which each was first defined as the pure element,[clarification needed] as the exact date of discovery… …   Wikipedia

  • niobium processing — Introduction       preparation of the ore for use in various products.       Niobium (Nb) has a body centred cubic (bcc) crystal structure and a melting point of 2,468° C (4,474° F). Of the refractory metals, it has the lowest density and best… …   Universalium

  • List of chemical elements naming controversies — This page was created by moving information from List of chemical element name etymologies Element 23Vanadium (named after Vanadis, another name for Frøya, the Scandinavian goddess of fertility) was originally discovered by Andrés Manuel del Río… …   Wikipedia

  • Rare earth element — Rare earth ore, shown with a United States penny for size comparison These rare …   Wikipedia

  • euxenite — /yoohk seuh nuyt /, n. a rare, brownish black mineral of complex composition, an oxide of calcium, cerium, yttrium, columbium, titanium, and uranium. [1840 45; < Gk eúxen(os) kind to strangers, hospitable (see EU , XENO ) + ITE1] * * * ▪ mineral… …   Universalium

  • Columbic — Co*lum bic, a. [From {Columbium}.] (Chem.) Pertaining to, or containing, columbium or niobium; niobic. [1913 Webster] {Columbic acid} (Chem.), a weak acid derived from columbic or niobic oxide, {Nb2O5}; called also {niobic acid}. [1913 Webster] …   The Collaborative International Dictionary of English

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