Difference between revisions of "Sulfur"
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| − | Sulfur is availible in lunar soil in significant quantities, principally in the form of troilite ([[Iron|Fe]]S), comprising around 1% of the lunar crust<ref name="wikisulfur">[http://en.wikipedia.org/wiki/Troilite | + | Sulfur is availible in lunar soil in significant quantities, principally in the form of troilite ([[Iron|Fe]]S), comprising around 1% of the lunar crust<ref name="wikisulfur">[http://en.wikipedia.org/wiki/Troilite Troilite on Wikipedia]</ref>. Magnetic benefication may be able to concentrate troilite out of the lunar regolith, as it is weakly magnetic when the crystal structure is incomplete, as well as being commonly associated with native iron<ref name="wikisulfur"> </ref>. In addition, concentrated veins of troilite have been found in some lunar rocks, and it has been suggested that larger deposits of the mineral may exist<ref>I. Casanova. [http://www.lpi.usra.edu/meetings/lpsc97/pdf/1483.PDF Feasibility and Applications of Sulfur Concrete for Lunar Base Development: A Preliminary Study.] Lunar and Planetary Science XXVIII</ref>. |
Several uses have been proposed for lunar sulfur, including [[In-Situ Propellant Production|rocket propellant]], production of sulfuric acid for industrial processes, lunar concrete, and sealants<ref>[http://www.nss.org/settlement/moon/library/LB2-509-UsesOfLunarSulfur.pdf V. T. Vaniman, D. R. Pettit, G. Heiken. "Uses of Lunar Sulfur" Los Alamos National Laboratory, 1988]</ref>. | Several uses have been proposed for lunar sulfur, including [[In-Situ Propellant Production|rocket propellant]], production of sulfuric acid for industrial processes, lunar concrete, and sealants<ref>[http://www.nss.org/settlement/moon/library/LB2-509-UsesOfLunarSulfur.pdf V. T. Vaniman, D. R. Pettit, G. Heiken. "Uses of Lunar Sulfur" Los Alamos National Laboratory, 1988]</ref>. | ||
Revision as of 10:52, 22 September 2011
| Sulfur | |
|---|---|
| S | |
| In situ availability: | good |
| Necessity: | |
| Atomic number: | 16 |
| Atomic mass: | 32.066 |
| group: | 16 |
| period: | 3 |
| normal phase: | Solid |
| series: | Non-metals |
| density: | (alpha) 2.07 g/cm3 (beta) 1.96 g/cm3 |
| melting point: | 388.36K, 115.21°C, 239.38°F |
| boiling point: | 717.8K, 444.6°C, 832.3°F |
| N ← O → F | |
| P ← S → Cl | |
| As ← Se → Br | |
| Atomic radius (pm): | 100 |
| Bohr radius (pm): | 88 |
| Covalent radius (pm): | 102 |
| Van der Waals radius (pm): | 180 |
| ionic radius (pm): | (-2) 184 |
| 1st ion potential (eV): | 10.36 |
| Electron Configuration | |
| 1s2 2s2 2p6 3s2 3p4 | |
| Electrons Per Shell | |
| 2, 8, 6 | |
| Electronegativity: | 2.58 |
| Electron Affinity: | 2.08 |
| Oxidation states: | +/-2, 4, 6 |
| Magnetism: | ? |
| Crystal structure: | Orthorhombic |
Sulfur is a Non-metal in group 16.
It has a Orthorhombic crystalline structure.
This element has 4 stable isotopes: 32, 33, 34, and 36.
Sulfur is availible in lunar soil in significant quantities, principally in the form of troilite (FeS), comprising around 1% of the lunar crust[1]. Magnetic benefication may be able to concentrate troilite out of the lunar regolith, as it is weakly magnetic when the crystal structure is incomplete, as well as being commonly associated with native iron[1]. In addition, concentrated veins of troilite have been found in some lunar rocks, and it has been suggested that larger deposits of the mineral may exist[2].
Several uses have been proposed for lunar sulfur, including rocket propellant, production of sulfuric acid for industrial processes, lunar concrete, and sealants[3].
References
- ↑ 1.0 1.1 Troilite on Wikipedia Cite error: Invalid
<ref>tag; name "wikisulfur" defined multiple times with different content - ↑ I. Casanova. Feasibility and Applications of Sulfur Concrete for Lunar Base Development: A Preliminary Study. Lunar and Planetary Science XXVIII
- ↑ V. T. Vaniman, D. R. Pettit, G. Heiken. "Uses of Lunar Sulfur" Los Alamos National Laboratory, 1988
