Crystals of sulphur

[Manfred]

Schwefelkristalle_2.jpg (292.59 KiB) Viewed 3372 times

Schwefelkristalle_1.jpg (296.32 KiB) Viewed 3372 times

Schwefelkristalle.jpg (271.31 KiB) Viewed 3372 times

Dear all,

when you ignite a match next to a cold microscope slide you can see afterwards sublimated crystals of sulphur.
Try it, good luck

[Oliver]

Yes, it works! There seem to be two different types of crystals.

Here are some under polarized light:


And here in bright field (These crystals were not visible when placed between crossed polarization filters):


Oliver.

[gekko]

A very interesting finding!

[JimT]

Under, above, or next to the slide? If next to do I hold the slide vertical? Don't want to burn my fingers.

[Oliver]

put slide on a plate, horizontally and light the match right above it. The head of the match should be close to the slide and the flame should almost touch the slide. You can see that it forms a deposit on the glass slide. So you do not hold an already burning match to the slide, rather you burn the head on the slide. You might also try to place a match on the slide and then light this one with a second match.
Oliver.