gray tin造句

• Tin has two allotropes : ?-tin, also known as gray tin, and ?-tin.
• Nothing like your average collection of gray tin boxes.
• Lota is a grim city _ somber, windswept, its main street lined by gray tin and wood houses.
• Gray tin has no metallic properties at all, is a dull gray powdery material, and has few uses, other than a few specialized semiconductor applications.
• The two allotropes that are encountered at normal pressure and temperature, ?-tin and ?-tin, are more commonly known as " gray tin " and " white tin " respectively.
• "' White tin "'may also refer specifically to ?-tin, the metallic allotrope of the pure element, as opposed to the nonmetallic allotrope ?-tin, known as " gray tin ", which occurs at temperatures below.
• In contrast, ?-tin ( nonmetallic form, or gray tin ), which is stable below, is brittle . ?-tin has a diamond cubic crystal structure, similar to diamond, silicon or germanium . ?-tin has no metallic properties at all because its atoms form a covalent structure in which electrons cannot move freely.