Iycr2014

2014 is The International Year of Crystallography and here are some crystals to celebrate the event.

Sodium chloride
NaCl_01

Sodium chloride crystals in an evaporating basin

Sodium chloride crystals in an evaporating basin

Sodium chloride crystals close up

Sodium chloride crystals close up

Sodium chloride crystals

Sodium chloride crystals

Sodium bromide
NaBr 01NaBr 02

Sodium bromide crystals on a watch glass

Sodium bromide crystals on a watch glass

Sodium bromide crystals close up

Sodium bromide crystals close up

Sodium iodide
NaI 01NaI 02

Sodium iodide crystallising in a Petri dish under the microscope

Sodium iodide crystallising in a Petri dish under the microscope

Sodium iodide crystals

Sodium iodide crystals

Sodium iodide in an evaporating basin

Sodium iodide in an evaporating basin

Sodium iodide crystal chunks

Sodium iodide crystal chunks

Sodium iodide on a watch glass

Sodium iodide on a watch glass

Potassium chloride
KCl 01KCl 02

Potassium chloride crystallising on a microscope slide

Potassium chloride crystallising on a microscope slide

Potassium chloride crystals

Potassium chloride crystals

KCl 05
Large potassium chloride crystals forming

Large potassium chloride crystals forming

Large crystals on a microscope slide

Large crystals on a microscope slide

Potassium bromide
KBr 01

Potassium bromide on a microscope slide

Potassium bromide on a microscope slide

Potassium bromide in an evaporating basin showing crystal creep

Potassium bromide in an evaporating basin showing crystal creep

Potassium bromide crystals

Potassium bromide crystals

Potassium iodide
KI 01

Potassium iodide crystals

Potassium iodide crystals

Potassium iodide crystals

Potassium iodide crystals

Potassium iodide crystal creep

Potassium iodide crystal creep

Ammonium sulfate
ammonium sulfate 01

Ammonium sulfate crystallising in an evaporating basin

Ammonium sulfate crystallising in an evaporating basin

Ammonium sulfate crystals

Ammonium sulfate crystals

Magnesium sulfate
MgSO4 01

Magnesium sulfate crystallising on a microscope slide

Magnesium sulfate crystallising on a microscope slide

Magnesium sulfate in an evaporating basin

Magnesium sulfate in an evaporating basin

Magnesium sulfate crystals

Magnesium sulfate crystals

Copper (II) sulfate
CuSO4 01

Copper sulfate in an evaporating basin

Copper sulfate in an evaporating basin

Copper sulfate crystals - blue diamond shaped

Copper sulfate crystals – blue diamond shaped

Last time I asked what would be the colours of rubidium and caesium in flame tests. The flame colours can be seen on this Royal Society of Chemistry video. I can see blue, purple and red colours in the rubidium and blue and a little purple in the caesium.

Violet is another word used to describe the colours which I have called purple.

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One thought on “Iycr2014

  1. Great photos! Reminds me of an experiment I do with the students using moth balls (napthalene I think). Scrape off some of the moth ball onto a microscope slide, gently heat the slide using a Bunsen (take care not to crack the slide), place another slide on top to make a liquid napthalene sandwich. Place under microscope with crossed polaroids to see the stress patterns formed at the grain boundaries as solidification takes place. Here is a video of it shot using an iphone down the objective lens: http://www.youtube.com/watch?v=kci8WLNsABE
    It’s rather tricky to do and to get a good shot; the fact that it is challenging is what makes the students enjoy doing it so much – and of course the pretty rainbow colours! Have you tried pouring out supercooled water to make a ice stalagmite? It would look great as a gif…. here is a video of it: http://www.youtube.com/watch?v=7NCEJqFC1uw
    when I make it I don’t bother with the freezer, just put the water bottles in a ice bath with a lot of salt – you can get the temperature down to -15 degrees C….

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