Calcium
Infrared - Pink - Red - Orange - Tan (Brown) - Yellow - Lime
Green - Aqua (Cyan) - Marine - Blue - Purple - Magenta - Ultraviolet
Radio Waves - Microwaves - Infrared - Optical - Ultraviolet - X-Rays - Gamma Rays
Cosmic Rays
| 20
| Calcium
| Ca
|
| Atomic Weight = 40.078 (4)
| Electrical Conductivity = 298 ´ 103 W-1cm-1
| Melting Point = 1112 K
|
| Density = 1.55 g/cm3
| Thermal Conductivity = 2.0 W/cm-K
| Boiling Point = 1757 K
|
| Molar Volume = 29.9 cm3/mole
|
| Heat of Fusion = 8.54 kJ/mole
|
| Heat of Vaporization = 153.6 kJ/mole
|
| Specific Heat Capacity = 0.63 J/g-K
|
| Isotope Number
| 40
| 42
| 43
| 44
| 46
| 48
|
| Isotope Fraction
| 0.96941 (156)
| 0.00647 (23)
| 0.00135 (10)
| 0.02086 (110)
| 0.00004 (3)
| 0.00187 (21)
|
HyperPhysics
Calcium is a very important alkaline earth metal, and a necessary Plant and Animal Nutrient.
Calcium occurs naturally in the form of Calcium Carbonate sedimentary precipitates, CaCO3 , otherwise known as Limestone, and it is thus a major component of Cement and Concrete.
Calcium is also widely incorporated into Living Systems, in the form of teeth and bone material in the higher vertebrates, and Shell Material in the marine invertebrates, and as a cellular electrolyte.
Calcium lies directly in the middle of the alkaline earth column of the Periodic Table, and thus separates the relatively light alkaline earth metals, such as Beryllium and Magnesium, from the relatively heavy alkaline earth metals, such as Strontium and Barium.
Oxides of Calcium, Strontium and Barium are important rocksalts, for defining the planar layers and the cubic vertices of the perovskite structure, in the molecular structures of both the Cuprate and Bismuthate - High Temperature Superconductors.
A Calcium containing Cuprate, BiSrCaCuO (BSCCO) has become the most stable and non-toxic working compound within High Temperature Superconductivity Science and Technology.
A series of Mercury and alkaline earth (Calcium) containing Cuprates, have the highest superconducting critical transition temperatures, or Tc's, of any known materials thus far discovered, Tc ~ 135 K.