Tableaux récapitulatifs des systèmes cristallins
Tableaux récapitulatifs des systèmes cristallins
Tableaux récapitulatifs des systèmes cristallins
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Système Groupe Position 1 Position 2 Position 3<br />
Points<br />
Triclinique<br />
1, ¯1<br />
Monoclinique 2, m, 2/m [010]<br />
(b unique)<br />
Orthorhombique 222, mm2 [100] [010] [001]<br />
mmm<br />
Quadratique 4, ¯4, 4/m<br />
422, 4mm [001] {[100] [010]} {[1¯10] [110]}<br />
¯42m,<br />
4<br />
m mm<br />
Trigonal / Rhomboédrique<br />
3, ¯3<br />
32, 3m, ¯3m<br />
hP [001] {[100] [010] [¯1¯10]}<br />
hR [111] {[1¯10] [01¯1] [¯101]}<br />
Hexagonal 6, ¯6, 6/m<br />
622, 6mm [001] {[100] [010] [¯1¯10]} {[1¯10] [120] [¯2¯10]}<br />
¯62m,<br />
6<br />
m mm<br />
Cubique<br />
23, m3<br />
432, ¯432 {[100] [010] [001]} {[111] [1¯1¯1] [¯11¯1] [¯1¯11]} {[1¯10] [110] [01¯1] [011] [¯101] [101]}<br />
m3m<br />
Tab. 4 – Les directions primaires caractéristiques <strong>des</strong> <strong>systèmes</strong> <strong>cristallins</strong>
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