<unk> , also known as lunar caustic, is a soluble chemical compound with chemical formula<unk> .  This compound is a versatile precursor to many other<unk>  compounds, such as those used in photography. Comparatively, it is far less sensitive to light than the halides. It is called lunar caustic because<unk>  was called luna by the ancient alchemists.
In solid<unk> , the<unk>  ions are three-coordinated in a trigonal planar arrangement.
Silver nitrate
Ammonium hexachloroplatinate
Lithium peroxide
Magnesium peroxide
Aluminium hydroxide
Dimethylcarbate
Mercuric iodide
Calcium fluoride