anhydralt

Anhydralt is a hypothetical chemical concept referenced in speculative chemistry and science fiction to denote an anhydrous derivative of a hydrated material. It is not a recognized compound in standard chemical databases, and there is no experimentally confirmed synthesis or characterization.

The term combines the prefix anhydro-, meaning without water, with a suffix that appears in fictional substance names. In discussions that treat anhyrdalt as a real possibility, it is described as a solid phase that has lost its water of hydration and therefore exhibits properties distinct from its hydrated precursor. Because there is no validated experimental data, there is no agreed-upon formula, crystal structure, or stoichiometry for anhyrdalt.

In theoretical models, anhyrdalt could be an oxide, salt, or mixed-oxide, formed by dehydration of a hydrated mineral. Proposed crystal systems vary, with some sketches suggesting cubic or tetragonal frameworks in which cations are coordinated by oxygen. Predicted properties likewise diverge across models, with speculations about high thermal stability, moderate hardness, and low hydration energy; densities are often suggested in a broad range because exact composition remains undefined.

Synthesis and stability remain purely hypothetical. Suggested routes include dehydration of a hydrated precursor under high temperature and reduced pressure or direct solid-state reactions of constituent elements under controlled conditions. In fiction, anhyrdalt is sometimes depicted as a versatile ceramic, energy-storage material, or structural component, illustrating dehydration chemistry or exotic material design. Because it lacks validation in real-world chemistry, anhyrdalt remains a speculative concept.