Difference between revisions of "S-block metals"
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=== harder compounds (silicates only?) === | === harder compounds (silicates only?) === | ||
| + | * '''Mg'''SiO<sub>3</sub> enstatite <ref>[https://en.wikipedia.org/wiki/Enstatite Wikipedia:Enstatite]</ref> Mohs 5-6 | ||
| + | * '''Ca'''SiO<sub>3</sub> wollastonite <ref>[https://en.wikipedia.org/wiki/Wollastonite Wikipedia:Wollastonite]</ref> Mohs 4.5-5 | ||
| + | ---- | ||
Some harder silicate compounds containing aluminum too are: | Some harder silicate compounds containing aluminum too are: | ||
| − | * '''Li'''Al(SiO<sub>3</sub>)<sub>2</sub> spodumene <ref>[https://en.wikipedia.org/wiki/Spodumene Wikipedia:Spodumene]</ref> Mohs 6.5-7 (contains unabundant lithium) | + | * '''Li'''Al(SiO<sub>3</sub>)<sub>2</sub> spodumene <ref>[https://en.wikipedia.org/wiki/Spodumene Wikipedia:Spodumene]</ref> Mohs 6.5-7 (contains unabundant lithium) -- monoclinic |
| − | * '''K'''Al(SiO<sub>3</sub>)<sub>2</sub> leucite <ref>[https://en.wikipedia.org/wiki/Leucite Wikipedia:Leucite]</ref> Mohs 5.5-6 | + | * '''Li'''Fe(SiO<sub>3</sub>)<sub>2</sub> lithium aegirine (not ocuuring naturally?) |
| − | * '''Na'''Al(SiO<sub>3</sub>)<sub>2</sub> jadeite (a chain/band silicate) <ref>[https://en.wikipedia.org/wiki/Jadeite Wikipedia:Jadeite]</ref> Mohs 6.5-7 | + | * '''K'''Al(SiO<sub>3</sub>)<sub>2</sub> leucite <ref>[https://en.wikipedia.org/wiki/Leucite Wikipedia:Leucite]</ref> Mohs 5.5-6 -- tetragonal dipyramidal -- with crystal water: analcime <ref>[https://en.wikipedia.org/wiki/Analcime Wikipedia:Analcime]</ref> Mohs 5-5.5 |
| + | * '''K'''Fe(SiO<sub>3</sub>)<sub>2</sub> potassium aegirine (not ocuuring naturally?) | ||
| + | * '''Na'''Al(SiO<sub>3</sub>)<sub>2</sub> jadeite (a chain/band silicate) <ref>[https://en.wikipedia.org/wiki/Jadeite Wikipedia:Jadeite]</ref> Mohs 6.5-7 -- monoclinic | ||
| + | * '''Na'''Fe(SiO<sub>3</sub>)<sub>2</sub> aegirine <ref>[https://en.wikipedia.org/wiki/Aegirine Wikipedia:Aegirine]</ref> Mohs 6 -- monoclinic -- there is a variety called "acmite" | ||
---- | ---- | ||
* '''NH<sub>4</sub>'''[AlSi<sub>3</sub>O<sub>8</sub>] buddingtonite <ref>[https://en.wikipedia.org/wiki/Buddingtonite Wikipedia:Buddingtonite]</ref> Mohs 5.5 (insoluble ammonium compound!) | * '''NH<sub>4</sub>'''[AlSi<sub>3</sub>O<sub>8</sub>] buddingtonite <ref>[https://en.wikipedia.org/wiki/Buddingtonite Wikipedia:Buddingtonite]</ref> Mohs 5.5 (insoluble ammonium compound!) | ||
| − | * '''Li'''[AlSi<sub>3</sub>O<sub>8</sub>] (unknown? - in literature - are there crystals?) | + | * '''Li'''[AlSi<sub>3</sub>O<sub>8</sub>] (unknown? - in literature - are there crystals?) -- monoclinic |
| − | * '''K'''[AlSi<sub>3</sub>O<sub>8</sub>] orthoclase <ref>[https://en.wikipedia.org/wiki/Orthoclase Wikipedia:Orthoclase]</ref> (feldspar member) Mohs 6 (defining mineral) and amazonite <ref>[https://de.wikipedia.org/wiki/Amazonit Wikipedia(de):Amazonit]</ref> Mohs 6-6.5 and sanidine (endmember?) <ref>[https://en.wikipedia.org/wiki/Sanidine Wikipedia:Sanidine]</ref> Mohs 6 and microline <ref>[https://de.wikipedia.org/wiki/Mikroklin Wikipedia(de):Mikrolin]</ref> Mohs 6-6.5 | + | * '''K'''[AlSi<sub>3</sub>O<sub>8</sub>] orthoclase <ref>[https://en.wikipedia.org/wiki/Orthoclase Wikipedia:Orthoclase]</ref> (feldspar member, monoclinic) Mohs 6 (defining mineral) and amazonite <ref>[https://de.wikipedia.org/wiki/Amazonit Wikipedia(de):Amazonit]</ref> Mohs 6-6.5 and sanidine (endmember?) <ref>[https://en.wikipedia.org/wiki/Sanidine Wikipedia:Sanidine]</ref> Mohs 6 and microline <ref>[https://de.wikipedia.org/wiki/Mikroklin Wikipedia(de):Mikrolin]</ref> Mohs 6-6.5 |
* '''Na'''[AlSi<sub>3</sub>O<sub>8</sub>] albite (sodium placgioclase feldspar) <ref>[https://en.wikipedia.org/wiki/Albite Wikipedia:Albite]</ref> Mohs 6-6.5 | * '''Na'''[AlSi<sub>3</sub>O<sub>8</sub>] albite (sodium placgioclase feldspar) <ref>[https://en.wikipedia.org/wiki/Albite Wikipedia:Albite]</ref> Mohs 6-6.5 | ||
---- | ---- | ||
| Line 34: | Line 40: | ||
* '''Na'''AlSi<sub>4</sub>O<sub>10</sub> sodium petalite | * '''Na'''AlSi<sub>4</sub>O<sub>10</sub> sodium petalite | ||
---- | ---- | ||
| − | * '''Ca'''Al<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> anorthite (calcium plagioclase feldspar) <ref>[https://en.wikipedia.org/wiki/Anorthite Wikipedia: | + | * '''Ca'''Al<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> anorthite (calcium plagioclase feldspar) <ref>[https://en.wikipedia.org/wiki/Anorthite Wikipedia:Anorthite]</ref> Mohs 6 |
* '''Mg'''Al<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> magnesium aluminosilicate (there are various associated hydroxide minerals => solubility?) | * '''Mg'''Al<sub>2</sub>Si<sub>2</sub>O<sub>8</sub> magnesium aluminosilicate (there are various associated hydroxide minerals => solubility?) | ||
* Fe or Cr replacing Al => unknown | * Fe or Cr replacing Al => unknown | ||
| Line 52: | Line 58: | ||
* '''Mg<sub>3</sub>'''Cr<sub>2</sub>(SiO<sub>4</sub>)<sub>3</sub> Knorringite <ref>[https://en.wikipedia.org/wiki/Knorringite Wikipedia:Knorringite]</ref> Mohs 6-7 | * '''Mg<sub>3</sub>'''Cr<sub>2</sub>(SiO<sub>4</sub>)<sub>3</sub> Knorringite <ref>[https://en.wikipedia.org/wiki/Knorringite Wikipedia:Knorringite]</ref> Mohs 6-7 | ||
| − | === softer compounds === | + | ---- |
| + | |||
| + | * '''NaCa<sub>2</sub>'''Si<sub>3</sub>O<sub>8</sub>(OH) calcium sérandite <ref>[https://en.wikipedia.org/wiki/S%C3%A9randite Wikipedia:Sérandite]</ref> Mohs 5-5.5 | ||
| + | |||
| + | === harder compounds (phosphates) === | ||
| + | |||
| + | * '''Li'''FePO<sub>4</sub> triphylite <ref>[https://en.wikipedia.org/wiki/Triphylite Wikipedia:Triphylite]</ref> Mohs 4-5 | ||
| + | * '''Li'''MnPO<sub>4</sub> lithiophilite <ref>[https://en.wikipedia.org/wiki/Lithiophilite Wikipedia:Lithiophilite]</ref> Mohs 4-5 (unabundant manganese) | ||
| + | * '''K'''FePO<sub>4</sub> (unknown??) | ||
| + | * '''Na'''FePO<sub>4</sub> maricite <ref>[https://en.wikipedia.org/wiki/Maricite Wikipedia:Maricite]</ref> Mohs 4-4.5 | ||
| + | |||
| + | * '''(Li,Na)'''AlPO<sub>4</sub>(F,OH) amblygonite (endmembers) <ref>[https://en.wikipedia.org/wiki/Amblygonite Wikipedia:Amblygonite]</ref> Mohs 5.5-6 | ||
| + | * '''Mg'''Al<sub>2</sub>(PO<sub>4</sub>)<sub>2</sub>(OH)<sub>2</sub> magnesium lazulite <ref>[https://en.wikipedia.org/wiki/Lazulite Wikipedia:Lazulite]</ref> Mohs 5.5-6 | ||
| + | * '''Ca'''Al2(PO4)2(OH)2 gatumbaite Mohs 4-5 | ||
| + | |||
| + | === softer compounds (carbonates and otehrs) === | ||
When systematically building combinations of s-block metals and d-block nonmetal acids one | When systematically building combinations of s-block metals and d-block nonmetal acids one | ||
can find some barely soluble compounds: | can find some barely soluble compounds: | ||
* calcium carbonate '''Ca'''CO3 (limestone/chalk ... calcite/aragonite/vaterite) | * calcium carbonate '''Ca'''CO3 (limestone/chalk ... calcite/aragonite/vaterite) | ||
| + | * dolomite '''CaMg'''(CO<sub>3</sub>)<sub>2</sub> <ref>[https://en.wikipedia.org/wiki/Dolomite Wikipedia:Dolomite]</ref> Mohs 3.5-4 | ||
* calcium phosphates (similar to hydroxyapatit bone tooth-enamel) | * calcium phosphates (similar to hydroxyapatit bone tooth-enamel) | ||
* calcium silicate '''Ca'''SiO3 (dry wall plates ... wollastonite) | * calcium silicate '''Ca'''SiO3 (dry wall plates ... wollastonite) | ||
| Line 74: | Line 96: | ||
* '''Be'''O (brommelite Mohs 9) <ref>[https://en.wikipedia.org/wiki/Bromellite Wikipedia:Brommelite]</ref> beryllium oxide | * '''Be'''O (brommelite Mohs 9) <ref>[https://en.wikipedia.org/wiki/Bromellite Wikipedia:Brommelite]</ref> beryllium oxide | ||
* '''Be'''Al2O4 chrysoberyl | * '''Be'''Al2O4 chrysoberyl | ||
| + | * '''MgF2''' Sellaite (very slightly soluble - unhealthy) <ref>[https://en.wikipedia.org/wiki/Sellaite Wikipedia:Sellaite]</ref> | ||
== ['''todo:'''] == | == ['''todo:'''] == | ||
| Line 79: | Line 102: | ||
*[maybe find some compounds of the heavier and less abundant ones (Rb & Cs) (Sr & Ba)] | *[maybe find some compounds of the heavier and less abundant ones (Rb & Cs) (Sr & Ba)] | ||
*[treat aluminum as special case] | *[treat aluminum as special case] | ||
| + | |||
| + | == Related == | ||
| + | |||
| + | * [[Gemstone-like compound]] | ||
| + | * [[Chemical element]] | ||
| + | * [[Periodic table of elements]] | ||
== External links == | == External links == | ||
<references> | <references> | ||
Latest revision as of 09:33, 26 June 2021
Contents
s-block metals as material filler
The lighter ones of the alkali- and alkaline earth metals (the non-noble metals in the left s-block of the periodic table) belong to the most abundant elements around. Thus its an iteresting question wheter those elements can be combined with other abundant ones to make structural building materials.
solubility issue
The s-block metals need to be combined with other elements not only because metals are not very suitable for mechanosynthesis but also because they are extremely reactive in pure form. A self passivation oxide layer film like the one that macroscopic blocks of magnesium have is obviously not possible on nano sized building blocks. In contact to air oxidation would go down right to the core of the building block and blow up the part twice in volume destroying it completely.
Since s-block metals are so electropositive they tend to toss away their shell electron or pair of shell electrons and thus tend to form ionic salts. Such a salt usually has the form:
- positively charged s-block-metal + negatively charged nonmetal-acid
Polar salts of this form are easily dissolved in water since water is a polar solvent. But good water solubility is not what one usually wants from a typical building material - especially not if the solvent is toxic like it is the case with many beryllium compounds. So the focus here will be on the few non or barely water soluble compounds.
barely soluble salts (*ates)
harder compounds (silicates only?)
Some harder silicate compounds containing aluminum too are:
- LiAl(SiO3)2 spodumene [3] Mohs 6.5-7 (contains unabundant lithium) -- monoclinic
- LiFe(SiO3)2 lithium aegirine (not ocuuring naturally?)
- KAl(SiO3)2 leucite [4] Mohs 5.5-6 -- tetragonal dipyramidal -- with crystal water: analcime [5] Mohs 5-5.5
- KFe(SiO3)2 potassium aegirine (not ocuuring naturally?)
- NaAl(SiO3)2 jadeite (a chain/band silicate) [6] Mohs 6.5-7 -- monoclinic
- NaFe(SiO3)2 aegirine [7] Mohs 6 -- monoclinic -- there is a variety called "acmite"
- NH4[AlSi3O8] buddingtonite [8] Mohs 5.5 (insoluble ammonium compound!)
- Li[AlSi3O8] (unknown? - in literature - are there crystals?) -- monoclinic
- K[AlSi3O8] orthoclase [9] (feldspar member, monoclinic) Mohs 6 (defining mineral) and amazonite [10] Mohs 6-6.5 and sanidine (endmember?) [11] Mohs 6 and microline [12] Mohs 6-6.5
- Na[AlSi3O8] albite (sodium placgioclase feldspar) [13] Mohs 6-6.5
- LiAlSi4O10 petalite [14] Mohs 6-6.5
- KAlSi4O10 (unknown? potassium petalite)
- NaAlSi4O10 sodium petalite
- CaAl2Si2O8 anorthite (calcium plagioclase feldspar) [15] Mohs 6
- MgAl2Si2O8 magnesium aluminosilicate (there are various associated hydroxide minerals => solubility?)
- Fe or Cr replacing Al => unknown
Garnets containing aluminum:
- Ca3Al2(SiO4)3 grossularite [16] Mohs 7-7.5 (an ugrandite garnet and nesosilicate)
- Mg3Al2(SiO4)3 pyrope [17] Mohs 7-7.5 (a pyralspite garnet and nesosilicate)
Ugrandite garnets are defined by their calcium content:
- Ca3Al2(SiO4)3 grossularite Mohs 7-7.5
- Ca3Fe2(SiO4)3 andardite [18] Mohs 6.5-7
- Ca3Cr2(SiO4)3 uvarovite [19] Mohs 6.5-7 (contains unabundant chromium)
Magnesium analogs to ugrandite garnets:
- Mg3Al2(SiO4)3 pyrope Mohs 7-7.5
- Mg3Fe2(SiO4)3 (unknown?)
- Mg3Cr2(SiO4)3 Knorringite [20] Mohs 6-7
- NaCa2Si3O8(OH) calcium sérandite [21] Mohs 5-5.5
harder compounds (phosphates)
- LiFePO4 triphylite [22] Mohs 4-5
- LiMnPO4 lithiophilite [23] Mohs 4-5 (unabundant manganese)
- KFePO4 (unknown??)
- NaFePO4 maricite [24] Mohs 4-4.5
- (Li,Na)AlPO4(F,OH) amblygonite (endmembers) [25] Mohs 5.5-6
- MgAl2(PO4)2(OH)2 magnesium lazulite [26] Mohs 5.5-6
- CaAl2(PO4)2(OH)2 gatumbaite Mohs 4-5
softer compounds (carbonates and otehrs)
When systematically building combinations of s-block metals and d-block nonmetal acids one can find some barely soluble compounds:
- calcium carbonate CaCO3 (limestone/chalk ... calcite/aragonite/vaterite)
- dolomite CaMg(CO3)2 [27] Mohs 3.5-4
- calcium phosphates (similar to hydroxyapatit bone tooth-enamel)
- calcium silicate CaSiO3 (dry wall plates ... wollastonite)
- magnesium silicate Mg2SiO4 (forsterite - no crystal water - pretty hard - neosilicate - earth mantle mineral)
- magnesium silicate Mg3Si4O10(OH)2 (talc - a hydroxide - way too soft for a building material)
Beryllium silicates:
- beryl Be3Al2(SiO3)6 (cyclosilicate) wikipedia
varieties: emerald (green Cr), aquamarine (blue Fe), red beryl (red Mn), goshenite (colorless), heliodor (yellow Fe), and morganite (pink Mn) - phenakite Be2SiO4 (neosilicate)
- bertrandite Be4Si2O7(OH)2 (hydorxide - pretty hard - sorosilicate)
non salts but (*ides)
Probably the simplest barely soluble earth alkali compounds (that are not salts) are:
- MgO (periclase ... magnesia) magnesium oxide (nontoxic)
- CaF2 (fluorite) calcium fluoride
- BeO (brommelite Mohs 9) [28] beryllium oxide
- BeAl2O4 chrysoberyl
- MgF2 Sellaite (very slightly soluble - unhealthy) [29]
[todo:]
- [find some insoluble alkali compounds Li Na K]
- [maybe find some compounds of the heavier and less abundant ones (Rb & Cs) (Sr & Ba)]
- [treat aluminum as special case]
Related
External links
- ↑ Wikipedia:Enstatite
- ↑ Wikipedia:Wollastonite
- ↑ Wikipedia:Spodumene
- ↑ Wikipedia:Leucite
- ↑ Wikipedia:Analcime
- ↑ Wikipedia:Jadeite
- ↑ Wikipedia:Aegirine
- ↑ Wikipedia:Buddingtonite
- ↑ Wikipedia:Orthoclase
- ↑ Wikipedia(de):Amazonit
- ↑ Wikipedia:Sanidine
- ↑ Wikipedia(de):Mikrolin
- ↑ Wikipedia:Albite
- ↑ Wikipedia:Petalite
- ↑ Wikipedia:Anorthite
- ↑ Wikipedia:Grossular
- ↑ Wikipedia:Pyrope
- ↑ Wikipedia:Andradite
- ↑ Wikipedia:Uvarovite
- ↑ Wikipedia:Knorringite
- ↑ Wikipedia:Sérandite
- ↑ Wikipedia:Triphylite
- ↑ Wikipedia:Lithiophilite
- ↑ Wikipedia:Maricite
- ↑ Wikipedia:Amblygonite
- ↑ Wikipedia:Lazulite
- ↑ Wikipedia:Dolomite
- ↑ Wikipedia:Brommelite
- ↑ Wikipedia:Sellaite
