Point Groups Crystal Classes Stereographic Projections Used to
- Slides: 19
Point Groups (Crystal Classes)
Stereographic Projections • Used to display crystal morphology. • X for upper hemisphere. • O for lower.
Stereographic Projections • We will use stereographic projections to plot the perpendicular to a general face and its symmetry equivalents (general form hkl). • Illustrated above are the stereographic projections for Triclinic point groups 1 and -1.
32 Point. Groups: Hermann-Mauguin Symbols • Three positions in H-M symbol • • • Triclinic: No unique axis Only 1 or -1 Monoclinic: [010] Orthorhombic: [100], [010], [001] Tetragonal: [001], [100], [110] Trigonal: [001], [100], Hexagonal: [001], [100], [210] • Cubic: [100], [111], [110]
32 Point. Groups (Crystal Classes) • • • Triclinic: 1, 1 Monoclinic: 2, 2=m, 2/m Orthorhombic: 222, 2 mm, 2/m 2/m (=mmm) Tetragonal: 4, 4, 4/m, 422 4 mm 4/m 2/m Trigonal: 3, 3 m, 32, 3, 32/m Hexagonal: 6, 6, 6/m, 6 m 2, 622, 6 mm, 6/m 2/m • Cubic: 23, 2/m 3, 432, 43 m, 4/m 32/m
Triclinic System
Monoclinic System
Orthorhombic System
Trigonal System
Trigonal System
Tetragonal System
Tetragonal System
Tetragonal System
Hexagonal System
Hexagonal System
Hexagonal System
Cubic System
Cubic System
32 Point. Groups (Crystal Classes) • • • Triclinic: 1, 1 Monoclinic: 2, 2=m, 2/m Orthorhombic: 222, 2 mm, 2/m 2/m (=mmm) Tetragonal: 4, 4, 4/m, 422 4 mm 4/m 2/m Trigonal: 3, 3 m, 32, 3, 32/m Hexagonal: 6, 6, 6/m, 6 m 2, 622, 6 mm, 6/m 2/m • Cubic: 23, 2/m 3, 432, 43 m, 4/m 32/m
32 point groups stereographic projections
Stereographic projection of point groups
Orthographic projection geology
Stereographic projection crystallography
Tetragonal stereographic projection
Classe e subclasse do que
Pre ap classes vs regular classes
How are ethnic groups and religious groups related
Lausd salary points
Point groups chemistry
Nfo2 molecule
Scalar and vector projections
Projection of points in first quadrant
A line ab 75mm long, is inclined at 45 to h.p. and 30 to vp
Newman projection practice
Robinson projection ap human geography
Isometric drawing with orthographic view and dimensions
Cyclobutane newman projection
Cardio thoracic ratio
Find the scalar and vector projections of b onto a.
