nonstoichiometric crystal

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• nonstoichiometric compound — ▪ chemistry       any solid chemical compound in which the numbers of atoms of the elements present cannot be expressed as a ratio of small whole numbers; sometimes called berthollide compounds in distinction from daltonides (in which the atomic… …   Universalium

• Crystal structure of boron-rich metal borides — Two single crystals of YB66 (1 cm diameter) grown by floating zone technique using (100) oriented seeds. In the top crystal, the seed (left from the black line) has same diameter as the crystal. In the bottom crystal (sliced), the seed is much… …   Wikipedia

• Non-stoichiometric compound — Crystallographic defects can cause solids to be non stoichiometric Non stoichiometric compounds are chemical compounds with an elemental composition that cannot be represented by a ratio of well defined natural numbers, and therefore violate the… …   Wikipedia

• rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

• Protactinium — thorium ← protactinium → uranium Pr ↑ Pa ↓ …   Wikipedia

• Actinide — The atomic bomb dropped on Nagasaki had a plutonium charge.[1] The actinide or actinoid (IUPAC nomenclature) series encompasses the 15 metallic chemical elements with atomic numbers from 89 to 103, actinium thro …   Wikipedia

• Copper sulfide — Copper sulfides describe a family of chemical compounds and minerals with the formula CuxSy. Both minerals and synthetic materials comprise these compounds. Some copper sulfides are economically important ores. Prominent copper sulfide minerals… …   Wikipedia

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

• Manganese dioxide — Manganese dioxide …   Wikipedia

• Michael Ruck — (* 23. November 1963 in Pforzheim) ist ein deutscher Chemiker. Inhaltsverzeichnis 1 Lebenslauf und akademischer Werdegang 2 Mitgliedschaften 3 Publikationen …   Deutsch Wikipedia

• Colored gold — Ternary plot of different colors of Ag Au Cu alloys While pure gold is yellow in color, colored gold can be developed into various colors. These colors are generally obtained by alloying gold with other elements in various proportions. For… …   Wikipedia