Calciumin

Calciumin is a fictional chemical element used in speculative fiction and some theoretical discussions as a hypothetical member of the alkaline earth metals. The name combines calcium with the common element-naming suffix -in and is often employed to explore ideas about expanding the known periodic table.

In typical fictional treatments, calciumin is described as a soft, light metal with properties that place it near calcium in chemistry, but with additional features imagined for a heavier analogue. Authors sometimes assign it a +2 oxidation state as a baseline, while other depictions speculate about higher oxidation states that enable novel oxide chemistries. Its exact position in the periodic table varies by world-building, with some sources placing it below strontium and others envisioning it as a superheavy, short-lived element.

Occurrence and production are entirely fictional. Calciumin is not known to exist in the real world, and in stories it is usually described as being synthesized in advanced laboratories or extracted from specially processed minerals within a fictional setting. The metal is generally portrayed as highly reactive, often requiring inert or controlled atmospheres for handling, mirroring the cautious treatment of reactive alkaline earth metals in real chemistry.

Applications in fiction frequently involve calciumin compounds used for energy storage, lightweight alloys, or catalysts in extraordinary chemical scenarios. Real-world chemistry has no verified calciumin, so all practical uses described are speculative and limited to imagined contexts.

Safety in fictional contexts emphasizes reactivity with water and air, potential exothermic reactions, and the need for appropriate containment. See also: Calcium, Alkaline earth metals, Hypothetical elements, Elements in fiction.