Crystals

I find crystals in all their variety quite fascinating. They are often especially beautiful when seen with the polarising light microscope.

Potassium chlorate

Potassium Chlorate

Watson Bactil Binocular microscope, Objective: x10 parachromat, Ocular: x8 compensating. Polarised light

Carbamazepine crystalhenge

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)

 

Salicine

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

 

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.

 

 

HOME: RELOAD MICRO PAGES

HOME: RELOAD FRAMES FOR MAIN SITE