Crystals

Carbamazepine crystals making a sort of "Crystalhenge" on the surface of a tablet. This is an electron micrograph kindly taken by P. Johnson for me in the course of some studies at work (Matthews, G.P., Lowther, N., Shott, M., Int. J. Pharm., 50 (1989) 111- 115)	Salicin crystals. Salicin is the natural glycoside that aspirin copies
Salicine starburst: the centre of a cluster of crystals Zeiss GFL Microscope Objective: Zeiss x40 plan achromat Ocular: Watson x8 compensating Polarised light	Salicin	Aspirin
	Potassium chlorate
Potassium chlorate	Potassium chlorate
Tartaric acid Projectina Microscope Objective: 20x Projectina achromat Ocular: Olympus 10x Photo Polarised light	Barium platinic cyanide Projectina Microscope Objective: 20x Projectina achromat Ocular: Olympus 10x Photo Polarised light
These are crystals of an experimental compound intermixed with feathery crystal-like wax (mainly blue) seen in polarised light. This was taken using a Projectina microscope equipped with a type 545 Polaroid camera back .	These are crystalline fans of an experimental compound in aqueous suspension. Each fan is about 5mm across. Once again this is using the Projectina microscope.
Polyethylene Glycol 3350 A wax that melts at about 50 degrees Celsius Projectina microscope Objective: Watson x4 parachromat Ocular: Wild x10 photo No substage condenser Crossed polarising filters (integral with Projectina) Camera: Aiptek PocketCam 3 Mega Another picture here
This is a film of a wax viewed in polarised light using the Projectina microscope. This shows plenty of crystalline structure. The wax is a commercial material called Gelucire 44/14 used in pharmaceutical formulation.
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