Silicates are minerals that contain silicon atoms bonded to oxygen atoms. The basic building block for all silicate minerals is called a tetrahedron, where one silicon atom is bonded to 4 oxygen atoms (Figure 3.6). Silicate minerals also often contain other elements, such as calcium, iron, and magnesium.hosphates have a tetrahedron building block that is similar to that of the silicates. But, instead of silicon, phosphates have an atom of phosphorus, arsenic, or vanadium bonded to oxygen. Although there are many minerals in this group, most of the minerals are rare.
Neptune is the coldest planet in the Solar System. At the top of its clouds, temperatures on Neptune can dip down to 51.7 Kelvin, or -221.4 degrees Celsius. Thatâs cold! Pluto gets colder, but then, Pluto isnât a planet any more.
Neptune. Neptune is the 8th planet in our Solar System and the furthest from the Sun, being some 2,798,310,157 miles from the Sun. This was the first planet to be found using mathematics rather than observation techniques. Neptune is the fourth-largest planet by diameter and the third-largest by mass.Neptune as with Uranus is an Gas Giant and also an Ice Giant, and has 12 known moons orbiting it, and the planet orbits the Sun every 165 Earth years and has been named after the Roman god of the sea.eptune is the fourth-largest planet by diameter and the third-largest by mass. Neptune as with Uranus is an Gas Giant and also an Ice Giant, and has 12 known moons orbiting it, and the planet orbits the Sun every 165 Earth years and has been named after the Roman god of the sea.