Solid 27726 225372527 2008-07-13T09:58:47Z SmackBot 433328 Date the maintenance tags or general fixes '''{{Continuum mechanics}} {{otheruses}} A '''solid''' object is in the [[states of matter]] characterized by resistance to [[deformation]] and changes of [[volume]]. At the microscopic scale, a solid has these properties : * The [[atom]]s or [[molecule]]s that compose the solid are packed closely together. * These constituent elements have fixed [[position]]s in [[space]] relative to each other. This accounts for the solid's rigidity. In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. A crystal structure is composed of a unit cell, a set of atoms arranged in a particular way; which is periodically repeated in three dimensions on a lattice. The spacing between unit cellious devoicecal in various directions is called its lattice parameters. The symmetry properties of the crystal are embodied in its space group. A crystal's structure and symmetry play a role in determining many of its properties, such as [[cleavage]], electronic band structure, and optical properties. ** If sufficient force is applied, either of these properties can be disrupted, causing permanent deformation. * Because solids have [[thermal energy]], their atoms vibrate. However, this movement is very small, and cannot be observed or felt under ordinary conditions. The branch of [[physics]] that deals with solids is called '''[[solid-state physics]]''', and is a type of [[condensed matter physics]]. [[Materials science]] is primarily concerned with properties of solids such as strength and [[Phase (matter)|phase]] transformations. It overlaps strongly with solid-state physics. [[Solid-state chemistry]] overlaps both of these fields, but is especially concerned with the synthesis of novel materials. The lightest known solids are [[aerogel]]s. The lightest aerogel produced has a density of 1.9 [[milligram|mg]]/cm³ or 1.9 [[kilogram|kg]]/m³ (1/530 the density of water).{{Fact|date=July 2008}} {{State of matter}} [[Category:Phases of matter]] [[Category:Solids]] [[af:Vastestof]] [[ar:صلب]] [[bs:Čvrsto stanje tvari]] [[bg:Твърдо тяло]] [[ca:Sòlid]] [[cs:Pevná látka]] [[da:Fast form]] [[de:Festkörper]] [[et:Tahkis]] [[el:Στερεό]] [[es:Sólido]] [[eo:Solido]] [[eu:Solido]] [[fa:جامد]] [[fr:État solide]] [[gl:Sólido]] [[ko:고체]] [[hr:Krutine]] [[id:Padat]] [[is:Storkuhamur]] [[it:Solido]] [[he:מוצק]] [[kn:ಘನ]] [[sw:Mango]] [[la:Solidus]] [[lv:Cieta viela]] [[jbo:sligu]] [[hu:Szilárd halmazállapot]] [[mk:Цврста агрегатна состојба]] [[ml:ഖരം]] [[ms:Pepejal]] [[nl:Vaste stof]] [[ja:固体]] [[no:Faststoff]] [[nn:Fast stoff]] [[nov:Solide]] [[om:Solid]] [[pl:Ciało stałe]] [[pt:Sólido]] [[ro:Solid]] [[qu:Sinchiyasqa]] [[ru:Твёрдое тело]] [[simple:Solid]] [[sk:Pevná látka]] [[sl:Trdnina]] [[fi:Kiinteä olomuoto]] [[sv:Fast form]] [[th:ของแข็ง]] [[vi:Chất rắn]] [[tr:Katı]] [[uk:Тверде тіло]] [[ur:ٹھوس]] [[zh-yue:固體]] [[zh:固体]]