Oxide+of+barium
51Han purple and Han blue — (also called Chinese purple and Chinese blue) are synthetic barium copper silicate pigments that were developed in China at least 2,000 years ago. Han purple and Han blue were used in ancient and imperial China from the Western Zhou period (1207… …
52Han Purple and Han Blue — Infobox Color|title=Han Purple|textcolor=white hex=5218FA r= 82|g= 24|b=250 c= |m= |y= |k= h= 260|s= 97|v= 47 source= [http://images.google.com/imgres?imgurl=http://www.spacedaily.com/images/microscopic han purple sm.jpg… …
53Vacuum tube — This article is about the electronic device. For experiments in an evacuated pipe, see free fall. For the transport system, see pneumatic tube. Modern vacuum tubes, mostly miniature style In electronics, a vacuum tube, electron tube (in North… …
54Uranate — A uranate is a ternary oxide involving the element uranium in one of the oxidation states +4, +5 or +6. A typical chemical formula is MxUyOz, where M represents a cation. The uranium atom in uranates(VI) has two short, co linear, U O bonds and… …
55Hot cathode — is also a name for a hot filament ionization gauge, a vacuum measuring device.In vacuum tubes, a hot cathode is a cathode electrode which emits electrons due to thermionic emission. ( Cf. cold cathodes, where field emission is used and which do… …
56Pyrotechnic composition — A pyrotechnic composition is a substance or mixture of substances designed to produce an effect by heat, light, sound, gas or smoke or a combination of these, as a result of non detonative self sustaining exothermic chemical reactions.… …
57oxyacid — /ok see as id/, n. Chem. an inorganic acid containing oxygen. Also called oxygen acid. [1830 40; OXY 2 + ACID] * * * ▪ chemical compound Introduction any oxygen containing acid. Most covalent nonmetallic oxides (oxide) react with water to… …
58Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …
59crystal — crystallike, adj. /kris tl/, n., adj., v., crystaled, crystaling or (esp. Brit.) crystalled, crystalling. n. 1. a clear, transparent mineral or glass resembling ice. 2. the transparent form of crystallized quartz. 3. Chem., Mineral. a solid body… …
60Crystal — /kris tl/, n. 1. a city in SE Minnesota, near Minneapolis. 25,543. 2. a female given name. * * * I Any solid material whose atoms are arranged in a definite pattern and whose surface regularity reflects its internal symmetry. Each of a crystal s… …
