pointgroups |
|||||
forms | mmm | mm2 | 222 |
||
c-pinacoid |
+ | - | + | ||
a-pinacoid |
+ | + | + | ||
b-pinacoid |
+ | + | + | ||
1st order prism |
+ | - | + | ||
2nd order prism |
+ | - | + | ||
3d order prism |
+ | + | + | ||
Orthorhombic dipyramid |
+ | - | - | ||
Pedion |
- | + | - | ||
1st order doma |
- | + | - | ||
2nd order doma |
- | + | - | ||
Orthorhombic pyramid |
- | + | - | ||
Orthorhombic disphenoid |
- | - | + |