| pointgroups |
forms | 3m | 3m | 32 | 3 | 3 |
pinacoid |
+ | - | + | + | - |
1st order trigonal prism |
- | + | - | - | + |
2nd order trigonal prism |
- | - | + | - | + |
3d order trigonal prism |
- | - | - | - | + |
1st order hexagonal prism |
+ | - | + | + | - |
2nd order hexagonal prism |
+ | + | - | + | - |
3d order hexagonal prism |
- | - | - | + | - |
dihexagonal prism |
+ | - | - | - | - |
ditrigonal prism |
- | + | + | - | - |
2nd order trigonal dipyramid |
- | - | + | - | - |
2nd order hexagonal dipyramid |
+ | - | - | - | - |
Pedion |
- | + | - | - | + |
2nd order hexagonal pyramid |
- | + | - | - | - |
1st order trigonal pyramid |
- | + | - | - | + |
2nd order trigonal pyramid |
- | - | - | - | + |
3d order trigonal pyramid |
- | - | - | - | + |
ditrigonal pyramid |
- | + | - | - | - |
1st order rhombohedron |
+ | - | + | + | - |
2nd order rhombohedron |
- | - | - | + | - |
3d order rhombohedron |
- | - | - | + | - |
Trigonal trapezohedron |
- | - | + | - | - |
Hexagonal scalenohedron |
+ | - | - | - | - |