CaPHO4
calcium hydrogen phosphate · monocalcium phosphate, calcium monohydrogen phosphate
CaPHO4 is a stable, insulating calcium phosphate compound frequently used in biological and industrial applications.

About calcium hydrogen phosphate
CaPHO4 is a thermodynamically stable inorganic compound that exists firmly on the convex hull, indicating significant structural robustness. As a wide-gap insulating material, it plays a critical role in the chemistry of calcium phosphates, which are foundational to both geological and biological systems.
Its structural versatility is evidenced by multiple reported crystalline forms, allowing it to function effectively in various chemical environments. The compound is widely utilized where stable, biocompatible phosphate sources are required, serving as a key component in materials science and nutritional chemistry.
Key Properties
Cross-validated computational properties for calcium hydrogen phosphate, aggregated across 3 databases.
Band GapEnergy needed to move an electron from the valence band to the conduction band. Lower or zero values tend to behave more metallic; larger gaps are more insulating or semiconducting.
Energy Above HullThermodynamic distance from the most stable set of competing phases. 0 eV/atom is on the convex hull; small positive values may still be experimentally accessible.
StabilityA plain-language summary of the best reported energy-above-hull result. It reflects whether the lowest-energy structure is on, near, or far from the stability hull.
StructuresCount of reported calculated crystal structures for this formula, including alternate polymorphs, source databases, and observed space groups.
Applications
Where calcium hydrogen phosphate is used.
Frequently Asked Questions
Common questions about calcium hydrogen phosphate, answered from cross-validated data.
What is CaPHO4?
CaPHO4 is a stable, insulating calcium phosphate compound frequently used in biological and industrial applications.
What is CaPHO4 used for?
What is the band gap of CaPHO4?
Is CaPHO4 a metal, semiconductor, or insulator?
Is CaPHO4 thermodynamically stable?
How many polymorphs of CaPHO4 are known?
What elements does CaPHO4 contain?
Where does the data for CaPHO4 come from?
How It Compares
As a primary calcium phosphate, CaPHO4 serves as a fundamental reference point for the study of mineral stability and phase transitions within the broader class of calcium-based inorganic compounds.
Data sources & attribution
- latticegraph — Lattice Graph Materials Intelligence Platform
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