Difference between revisions of "Salts of oxoacids"
m (carbonates) |
m (→Carbonate minerals) |
||
| Line 22: | Line 22: | ||
== Carbonate minerals == | == Carbonate minerals == | ||
| − | [http://en.wikipedia.org/wiki/Carbonate_minerals (wikipedia)] | + | [http://en.wikipedia.org/wiki/Carbonate_minerals (wikipedia - minerals)] |
| + | [http://en.wikipedia.org/wiki/Template:Carbonates (wikipedia - artificial)] | ||
* Calcite & Aragonite - calcium | * Calcite & Aragonite - calcium | ||
Revision as of 17:00, 9 April 2015
The X-O-X bonds present in those compounds increase the space between the spacially linking X atoms. This lead to a lower density of bonds in cross sections inclusion of bigger voids thus higher porousity. Due to the porousness of these compounds it is harder to get the surfaces flat - figuratively like the surface of a pumice stone. It's impossible to get them as smooth as passivated diamond. [todo: investigate wheter supralubricating bearings can be constructed from these types of diamondoid compounds]
Contents
Silicates (& Quartz)
Not exactly a salt but related ...
Phosphate minerals
- Especially interesting: Hydoxy- Fluor- & Clorappatite Ca5(PO4)3(F,Cl,OH) - (Mohs 5) - a biomineral
- Lazulite (wikipedia) & Scorzalite (wikipedia) magnesium iron aluminium phosphates - (Mohs 5.5-6)
- Phosphophyllite (wikipedia) - zinc iron phosphate - rather soft (Mohs 3.5)
- Pb5(PO4)3Cl pyromorphite (wikipedia) - relatively hard for a lead mineral (Mohs 3.5)
- YPO4 Xenotime (wikipedia) - rare yttrium - high symmetry (tetragonal) - (Mohs 4.5)
Carbonate minerals
(wikipedia - minerals) (wikipedia - artificial)
- Calcite & Aragonite - calcium
- Magnesite - magnesium
- Siderite - iron
- Smithsonite - zinc
- Malachite & Azurite - copper
- ...
Sulfate minerals
Sulfate minerals are generally rather soft with few exceptions.
One of the harder ones is brochantite (wikipedia) - (Mohs 3.5-4)
Nitrogen
All rather water soluble. See: (wikipedia - minerals) (wikipedia - artificial)
