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 is the planet that is the furthest away from the sun. It is about 4.5 billion kilometers from the sun, which is more than three times as distant as Saturn. It is also one of the coldest planets in the solar system. Neptune s temperature can be as low as 55 Kelvin (-218 degrees Celsius).The average temperature of Neptune is about 73 Kelvin (-200 Celsius). However, at the South Pole of Neptune the temperature is about -10 degrees Celsius warmer than the rest of the planet. The South Pole is warmer due to its exposure to the sun.eptune is the planet that is the furthest away from the sun. It is about 4.5 billion kilometers from the sun, which is more than three times as distant as Saturn. It is also one of the coldest planets in the solar system. Neptune s temperature can be as low as 55 Kelvin (-218 degrees Celsius).