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Crystal Structures
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Hexagonal Close-Packed (HCP)
Atoms arranged in closely packed hexagonal layers - Examples: Magnesium, Titanium
Wurtzite Structure
Hexagonal version of the Zinc Blende structure with tetrahedral coordination - Examples: ZnS (alternate form)
Cesium Chloride Structure
A simple cubic structure with a cesium ion at center and chlorine ions at corners, or vice versa - Examples: CsCl
Zinc Blende Structure
FCC lattice with a basis of two atoms, one at the corner and one at the face center of the FCC cell - Examples: ZnS
Face-Centered Cubic (FCC)
Atoms at each corner and centers of all the faces of the cube - Examples: Aluminum, Copper, Gold
Simple Cubic
Atoms located at each corner of a cube - Examples: Polonium
Perovskite Structure
Three-dimensional structure with a generic formula ABX3; A and B are cations and X is an anion - Examples: Calcium titanate (CaTiO3)
Body-Centered Cubic (BCC)
Atoms at cube corners and center - Examples: Chromium, Iron
Diamond Cubic
A variation of the FCC structure where each atom is covalently bonded to four others in a tetrahedral arrangement - Examples: Diamond, Silicon
Sodium Chloride Structure
Each sodium ion is surrounded by six chloride ions in an octahedral arrangement, and vice versa - Examples: NaCl, Halite
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