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SISTEMA CUBICO

Celda primitiva= Celda convencional. SISTEMA CUBICO. Cubica Simple. FCC. BCC. ESTRUCTURAS COMPACTAS. FCC. HCP. F.E=0.74. ESTRUCTURA DIAMANTE. Red FCC + base de 2 atomos C Base: (0,0,0) ; ( ¼, ¼, ¼) (2 FCC desplazadas por ( ¼, ¼, ¼)). Cristales: diamante, Si, Ge, Sn,

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SISTEMA CUBICO

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  1. Celda primitiva= Celda convencional SISTEMA CUBICO Cubica Simple.

  2. FCC

  3. BCC

  4. ESTRUCTURAS COMPACTAS FCC HCP F.E=0.74

  5. ESTRUCTURA DIAMANTE Red FCC + base de 2 atomos C Base: (0,0,0) ; ( ¼, ¼, ¼) (2 FCC desplazadas por ( ¼, ¼, ¼)) Cristales: diamante, Si, Ge, Sn, ZnS, III-V semiconductores (GaAs, InSb,…) 8 atomos por celda cubica 4 moleculas por celda cubica Numero Coordinacion: 4

  6. Na+ions Cl-ions (0,0,0) (½,½,½) (0,½,½) (½,1,1) (½,0,½) (1,½,1) (½,½,0) (1,1,½) NaCl structure 2 Redes FCC desplazados por ( ½ , ½, ½) Fcc base: Na (0,0,0) Cl (½,½,½) 8 iones por celda cubica 4 moleculas por celda Numero Coordinacion 6 Cristales: LiH, MgO, Mn0, AgBr, PbS, KCl

  7. Cs+ Cs+ions Cl-ions (0,0,0) (½,½,½) Cl- Estructura CsCl Atomos Base: 2 Redes CS desplazados ( ½ , ½, ½) Cristales: BeCu, AlNi, CuPd, CuZn, AgMg 2 ions por Celda Cubica 1 molecula celda Numero Coordinacion: 8

  8. Ca+ions F-ions F-ions (0,0,0) (¼,¼,¼ ) (¾, ¾, ¾) (0, ½, ½) (¼, ¾,¾) (¾, ¼, ¼,) (½,0, ½) (¾,¼, ¾) (¼, ¾, ¼,) (½,½,0) (¾, ¾,¼) (¼, ¼, ¾) Estructura Fluorita Posiciones Atomicas projectadas sobre una cara del cubo 3 Redes FCC en (0,0,0) y desplazados ( 1/4 ,1/4, 1/4) y (3/4, 3/4, 3/4) (Todos 8 sitios octahedrales ocupados) 01 ½ 01 12 ions por celda cubica 4 moleculas por celda ¼ ¾ ¼ ¾ 01 ½ ½ ¼ ¾ ¼ ¾ ½ 01 01 Cristales: CaF2

  9. ESTRUCTURA PEROVSKITA, ABO3 A, B cationes Cation A radio mayor Cation A: Numero Coordinac: 12 Cation B: Numero Coordinac: 6 Cristales: BaTiO3 , CaTiO3 , LaMnO3, SrTiO3

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