Cadmium sulfate
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Cadmium sulfate is the name of a series of related inorganic compounds with the formula Template:Chem2. The most common form is the monohydrate Template:Chem2, but two other forms are known: the octahydrate (Template:Chem2) and the anhydrous salt (Template:Chem2). All salts are colourless and highly soluble in water.
Preparation
Cadmium sulfate hydrate can be prepared by the reaction of cadmium metal or its oxide or hydroxide with dilute sulfuric acid:Template:Cn
The anhydrous material can be prepared using sodium persulfate:Template:Cn
Applications
Cadmium sulfate is used widely for the electroplating of cadmium in electronic circuits. It is also a precursor to cadmium-based pigment such as cadmium sulfide. It is also used for electrolyte in a Weston standard cell as well as a pigment in fluorescent screens.Template:Cn
Structure
X-ray crystallography shows that Template:Chem2 is a typical coordination polymer. Each Template:Chem2 center has octahedral coordination geometry, being surrounded by four oxygen centers provided by four sulfate ligands and two oxygen centers from the bridging water ligands.<ref>Template:Cite journal</ref>
Occurrence
Cadmium sulfates occur as the following rare minerals drobecite (Template:Chem2),Template:Contradictory inline voudourisite (monohydrate), and lazaridisite (the octahydrate).Template:Cn
Safety
Cadmium sulfate (along with cadmium and its compounds) are classified as group 1 (human carcinogens) by IARC and have been identified as causing lung and prostate cancer as well as mutagenic effects in humans.<ref>Template:Cite book</ref>