Color of Minerals: Azurite (deep blue) and Malachite (deep green) frequently occur together and have remarkably similar formulae: Azurite: Cu3 (CO3)2(OH)2
Malachite: Cu2 (CO3)(OH)2
Incandescence: light from heat energy, like the sun, or the tungsten filament in old school light bulbs glowing hot....
Luminescence: "cold light" from other sources of energy, can take place at normal or lower temps...
Some types of luminescence:
Fluorescence: lum. from energy supplied by electromagnetic radiation
Chemiluminescence: lum. from energy supplied by chemical reactions
Bioluminescence: lum. caused by chemical reactions in living things!
STRONTIUM is an interesting alkaline earth metal. Sr, atomic #38, atomic mass 87, electrons per shell: (2, 8, 18, 8, 2) . It's a soft, silver-white or yellowish metallic element (turns yellow when exposed to air) . It is HIGHLY reactive.... a fine powder of it ignites spontaneously in air! It burns crimson in a flame.....
Metallic strontium was first isolated by electrolysis by Sir Humphrey Davy in 1808, although the mineral strontianite was discovered in the lead mines in the Scottish village of Strontian in 1787.
Strontium occurs naturally in the minerals celestine and strontianite. It's compounds are used in glass for color TV cathode ray tubes to prevent x-ray emission. Strontium is also part of a durable magnesium alloy used in BMW engines!
1 comment:
I wonder if one could use Strontium as a magical powder to create spontaneous explosions? Is it that volatile that you couldn't carry it around? could you put some in a glass vial and then throw it down like a flash-bang!?
Oh magical metals...
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