# Chromium crystals and 1cm3 cube

- By: Alchemist-hp (talk) (www.pse-mendelejew.de)
- Date: 2010-04-24
- Classification: Photograph
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Chromium_crystals_and_1cm3_cube.jpg)
- Rights: [FAL](http://artlibre.org/licence/lal/en)
- Picture: https://upload.wikimedia.org/wikipedia/commons/thumb/0/08/Chromium_crystals_and_1cm3_cube.jpg/1920px-Chromium_crystals_and_1cm3_cube.jpg
- Who can see it: Teens profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

High purity (99.999 % = 5N) chromium crystals, produced by chemical transport reaction through decomposition of chromium iodides, as well as a high purity (99,95 % = 3N5) 1 cm3 chromium cube for comparison.