Sanidine exhibits the Carlsbad Twin law
Sanidine in plane polarized light
Sanidine in cross polarized light
|
Sanidine exhibits the Carlsbad Twin law
|
|
|
|
Sanidine in cross polarized light |
|
Microcline shows cross hatched twinning
that results from the Al-Si ordering upon cooling.
|
|
|
|
 Microcline in cross polarized light |
|
Plagioclase shows the characteristic
albite twinning that results from the Al-Si ordering upon cooling.
|
|
|
|
 Plagioclase in cross polarized light |
