Rock types made up of crystals or crystal fragments, such as metamorphic rocks that recrystallized in high temperature or pressure environments, or igneous rocks that formed from cooling of a melt
the state of a solid material characterized by a periodic and repeating three-dimensional arrays of atoms, ions, or molecules
consisting of or containing or of the nature of crystals; "granite is crystalline" transmitting light; able to be seen through with clarity; "the cold crystalline water of melted snow"; "crystal clear skies"; "could see the sand on the bottom of the limpid pool"; "lucid air"; "a pellucid brook"; "transparent cristal" distinctly or sharply outlined; "crystalline sharpness of outline"- John Buchan
transmitting light; able to be seen through with clarity; "the cold crystalline water of melted snow"; "crystal clear skies"; "could see the sand on the bottom of the limpid pool"; "lucid air"; "a pellucid brook"; "transparent cristal"
Imperfectly crystallized; as, granite is only crystalline, while quartz crystal is perfectly crystallized
Solid material composed of regularly repeating atoms, ions, or molecules that form defined patterns or lattice structures
The texture of groups or masses of minerals is said to be crystalline when distinct crystal faces are present Galena is an example of a crystalline mineral Crystalline texture is contrasted with granular texture
— Rock types made up of crystals or crystal fragments, such as metamorphic rocks that recrystallized in high-temperature or pressure environments, or igneous rocks that formed from cooling of a melt
Any rock composed entirely of crystallized minerals without glassy matter (matter without visible crystals). Intrusive igneous rocks (see intrusive rock) are nearly always crystalline; extrusive igneous rocks (see extrusive rock) may be partly to entirely glassy. Metamorphic rocks are also always completely crystalline and are termed crystalline schists or gneisses. Sedimentary rocks can also be crystalline, such as crystalline limestones that precipitate directly from solution; the term is not generally applied to clastic sediments (made of fragments of preexisting rock), even though they are formed largely from the accumulation of crystalline materials
Ordered repeated structures (crystals) encountered in polymers below a certain temperature Most polymers are semi-crystalline containing both crystalline and amorphous regions (see also GLASS TRANSITION and MELTING POINT)
A state of molecular structure in some resins attributed to the existence of solid crystals with a definite geometric form, Such structures are characterized by uniformity and compactness
The presence of three-dimensional order on the level of atomic dimensions In polymers, the range of order may be as small as about 2 nm in one (or more) crystallographic direction(s) and is usually below 50 nm in at least one direction Polymer crystals frequently do not display the perfection that is usual for low-molecular mass substances Polymer crystals that can be manipulated individually are often called polymer single crystals Pure and Appl chem, 1989, 61, 769 IUPAC Macromolecular Nomenclature