Muscovite crystal (thick), Bxa centered, 2V=45
Muscovite crystal, optic plane N-S
Muscovite crystal, Bxa centered, 2V=45
Muscovite crystal, with accessory plate (Z to NE)
Phlogophite, Bxa centered, 2V=10
Aragonite, Bxa centered, 2V=20
Please examine these figures to be sure that you recognize the positions
of the melatope, isogyres, and isochromes. You should also be able
to predict the principle vibration directions and birefringence throughout
the figure, and determine the optic sign of the mineral.
|
Muscovite crystal (thick), Bxa centered, 2V=45 |
Muscovite crystal, optic plane N-S |
|
Muscovite crystal, Bxa centered, 2V=45 |
Muscovite crystal, with accessory plate (Z to NE) |
|
Phlogophite, Bxa centered, 2V=10 |
Aragonite, Bxa centered, 2V=20 |