Abcand90 callister 812013 iitgandhinagar 10

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Unformatted text preview: 90° Callister 8/1/2013 IIT Gandhinagar 7 Hexagonal • a=b≠c and α=β=90° and γ=120° Callister 8/1/2013 IIT Gandhinagar 8 Tetragonal • a=b≠c and α=β=γ=90° Callister 8/1/2013 IIT Gandhinagar 9 Rhombohedral • a=b=c and α=β=γ≠90° Callister 8/1/2013 IIT Gandhinagar 10 Otrhorhombic • a≠b≠c and α=β=γ=90° Callister 8/1/2013 IIT Gandhinagar 11 Monoclinic • a≠b≠c and α=γ=90° and β≠90° Callister 8/1/2013 IIT Gandhinagar 12 Triclinic • a≠b≠c and α≠β≠γ≠90° 8/1/2013 IIT Gandhinagar 13 Crystal Systems • Cubic – most metals, and alloys • Hexagonal – Zn, Cd, Ti • Tetragonal – Rutile (TiO2), Zircon (ZrSiO4) • Rhombohedral – Dolomite [(CaMg)(CO3)2] • Orthorhombic – Epsomite (MgSO4.7H2O) • Monoclinic – Elemental sulfur • Tric...
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