Both our microscopes allow you to use
either transmitted light (comes up from underneath) or reflected light
down from above).
The white light
source on the right behind the SZX12 microscope delivers light from under the stage via
a fibre-optic and
the light source on the left delivers light through a fibre-optic
ringlight. Normally the ringlight is not used, but it is easily
attached by first removing the polarizer on the microscope objective
lens and sliding on the ringlight. The SZX9 has a twin-gooseneck
fibre-optic attached to a black light source. For transmitted light
simply swing the upper fibre-optic out of the way. For reflected light
you may want to place an opaque sheet (e.g.
paper) over the rotating stage centre. Sometimes you may need to raise
the microscope higher than its rack-and-pinion mechanism will allow. The release
screw on both microscopes is a big black knob on the back of the scope
body. Be careful - these are quite heavy microscopes and you do NOT
want to slam the objective into the rotating stage.
You will probably be mounting your
crystal from a drop of polyisobutene oil.
off the spatula first - you don't
know what the previous user had used it for and you do NOT
Nor do you want to
inadvertently determine the structure of someone else's
discarded crystals. Believe me, you will feel silly if you do this.
of oil on slide
in oil on slide
Get a blob of sticky paratone on a
spatula, plop it on a slide, stick some crystals in it and cover them
The oil acts is a barrier
to air and moisture as well as making a rock-solid mount when it is
the cold-gas stream on the diffractometer.
Also, try not to get oil all
over the place - it is a nuisance to clean up.
If you know that the spatula has only
oil on it (i.e. no crystals,
solvent or slime) then wipe the excess from the spatula back into the
bottle. Otherwise clean it with a