- crystalline solid – a solid with a regular arrangement of its components
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- amorphous solid – a solid with a considerable disorder in its structure
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- lattice – an arrangement of points or particles or objects in a regular periodic pattern in 2 or 3 dimensions
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- unit cell – the smallest group of atoms or molecules whose repetition at regular intervals in three dimensions produces the lattices of a crystal
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- X-ray diffraction – a technique for establishing the structure of crystalline solids by directing X rays of a single wavelength at a crystal and obtaining a diffraction pattern from which interatomic spaces can be determined.
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- ionic solid – solids composed of cations and anions.
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- molecular solid – solid composed of neutral molecules at its lattice points
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- atomic solid – solid composed of atoms at its lattice points
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- alloy – solids with metallic properties and contains a mixture of elements
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- substitutional alloy – host metal atoms replaced by other metal atoms of similar sizes
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- interstitial alloy – holes are occupied by small atoms
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- network solid – an atomic solid containing strong covalent bonds
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- glass – an amorphous solid obtained through the mixture of solica with other compounds. It is heated above its melting point then rapidly cooled.
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- ceramic – nonmetallic material made from lay. Similar to glass but brittle and heterogenous.
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- semiconductor – substance that conducts a small amount of electricity at room temeprature.
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