Difference between revisions of "Ternary and higher gem-like compounds"
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== Other == | == Other == | ||
| + | Various silicates [https://en.wikipedia.org/wiki/Silicate_minerals] | ||
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* MnSiO<sub>3</sub> rhodonite [https://en.wikipedia.org/wiki/Rhodonite] Mohs 5.5-6.5 | * MnSiO<sub>3</sub> rhodonite [https://en.wikipedia.org/wiki/Rhodonite] Mohs 5.5-6.5 | ||
* Na4Al3Si9O24Cl [https://en.wikipedia.org/wiki/Marialite marialite] Mohs 5.5-6 (scapolite end member) | * Na4Al3Si9O24Cl [https://en.wikipedia.org/wiki/Marialite marialite] Mohs 5.5-6 (scapolite end member) | ||
* Ca4Al6Si6O24CO3 [https://en.wikipedia.org/wiki/Meionite meionite] Mohs 5-6 (scapolite end member) | * Ca4Al6Si6O24CO3 [https://en.wikipedia.org/wiki/Meionite meionite] Mohs 5-6 (scapolite end member) | ||
Revision as of 07:47, 20 December 2015
Look out for rock forming minerals here
Alkali and earth alkali compounds tend to be rather soluble in binary compounds (you won't find many there) in ternary and higher compounds they tend to form less water soluble minerals. See: compounds with s-block metals
- Ca(OH)2 calcium hydroxide aka slaked lime (rather water soluble)
- CaCO3 calcium carbonate (very slightly soluble)
- MgCO3 magnesium carbonate aka magnesite (slightly soluble)
- Mg3B7O13Cl boracite (very slightly water soluble)
- ... many more e.g. MnCO3 rhodochrosite [1] Mohs 3.5-4
most common metal rich core mantle transition zone minerals
In the earths mantle and crust silicon and oxygen are the most abundant elements. On the borther to earths outer core this changes to iron and nickle. Down there the most abundant minearls are made from mixture of those elements. As a sidenote: In nature when iron rich metal is available in stochiometric excess heterogenous pallasite is formed. This rock looks really beautiful and can be found in some meteroids - recommendation to check it out.
- mixing series of olivine (wikipedia) / peridot (wikipedia) - (Mg,Fe)2SiO4
- with high pressure modifications: wadseylite (wikipedia) and ringwoodite (wikipedia)
Of interest as diamondoid materials may be the pure end members of the mixing series:
- Fayalite Fe2SiO4
- Forsterite Mg2SiO4
- Tephroite Mn2SiO4 (less interesting since Mn is more scarce)
- Titanium Silicate TiSiO4
related minerals:
- Ca(Mg,Fe)SiO4 - wikipedia: magnesium and iron monticellite
- CaTiSiO5 - wikipedia: Titanite or Sphene (optical dispersion exceeding diamond; birefringent)
- Mn3Al2(SiO4)3 - wikipedia: spessartine - (with rather rare Manganese)
- FeTiO3 - wikipedia: Ilmenite
Another interesting tertiary material falling in this scheme would be CSiO 4
a solid intermediate material between CO2(gas) SiO2(solid quartz): [2]
(A prototypical pseudo phase diagram.)
The spinell group (wikipedia)
These oxide minerals are devoid of the ubiquitously present silicon.
aluminum spinells
- MgAl2O4 - wikipedia: spinell
- FeAl2O4 - wikipedia: hercynite
- (Mg,Fe)Al2O4 - wikipedia: caylonite - mixing series inbetween the former two
- ZnAl2O4 - wikipedia: gahnite
- BeAl2O4 - wikipedia: crysoberyll
- MnAl2O4 - wikipedia: galaxite - (with rather rare manganese) - image
iron spinells
- MgFe2O4 - wikipedia: magnesioferrite
- TiFe2O4 - wikipedia: ulvöspinel
- ZnFe2O4 - wikipedia: franklinite
- NiFe2O4 - wikipedia: trevorite
- MnFe2O4 - wikipedia: jacobsite - (with rather rare manganese)
related compound:
- ZnFe3O4 - wikipedia: zinc ferrite - synthetic zinc ferrites
Other
Various silicates [3]
