Phosphorus
| P | 15 |
| Phosphorus | |
Abundance: 0.3%
Phosphorous, periodic table P, is a light metal. It's most common isotope is P31 ,with 16 neutrons.
Phosphorous is one of the "CHNOPS" elements (Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, & Sulfur). All life is 99% composed of these elements. Of all the CHNOPS elements, phosphorus is the rarest one. Fortunately, Mars seems to be fairly rich in phosphates.
availability
Phosphorous is available on Mars as phosphates. The Martian mantle is richer in potassium and phosphorus than Earth's, so the resource should be widely available, although concentrated ores need to be identified by exploration. The Columbia hills in Gusev crater have been shown by the Spirit rover to contain Phosphates.
Applications
- Phosphorous, with nitrogen, is one of the limiting factors of plant growth.
- Phosphorous is a plant fertilizer, required for DNA, energy storage and a number of functions in plants. The form usually used for this purpose is Calcium Phosphate, an oxide and calcium compound, with the chemical formulae CaH2(PO4)2. Calcium Phosphate is obtained on Earth using sulfuric acid treatment of phosphatic minerals. It is the main industrial use of sulfuric acid.
Pathfinder gave P concentrations that ranged from 0.4 to 0.7 weight percent for rocks and from 0.3 to 1.2 weight percent for soils. This is about 5 times greater than Earth. Phosphorous is a volatile element, so Mars (which formed farther from the sun) was expected to have a greater proportion than Earth.
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