Difference between revisions of "Sulfur"
(Added uses for sulfur, references, and links to propellant manufacture)
(Trolite is not magnetic, added changes to reflect methods of gathering)
|(4 intermediate revisions by 2 users not shown)|
|Line 43:||Line 43:|
Sulfur is availible in lunar soil in significant quantities, with
Sulfur is availible in lunar soil in significant quantities,
with as . by and .
Several uses have been proposed for lunar sulfur, including [[In-Situ Propellant Production|rocket propellant]], production of sulfuric acid for industrial processes, and sealants<ref>http://www.nss.org/settlement/moon/library/LB2-509-UsesOfLunarSulfur.pdf </ref>.
== References ==
== References ==
Latest revision as of 12:07, 22 September 2011
|In situ availability:||good|
|density:||(alpha) 2.07 g/cm3|
(beta) 1.96 g/cm3
|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|
|Electrons Per Shell|
|2, 8, 6|
|Oxidation states:||+/-2, 4, 6|
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. 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.
Troilite is non-magnetic when its crystal structure is complete. However, it is commonly associated with native iron in the lunar regolith. As such, magnetic gathering of iron fines could produce a significant amount of troilite as a byproduct. Troilite may also be separable from the lunar regolith by a combination of mechanical sifting and electrostatic beneficiation.