Copper fluoride characteristics

Deficiency of T. e. can lead to characteristic deficiency symptoms or diseases, thus indicating the essential nature of these nutritional factors, e g. iodine is a component of the thyroid hormones and essential for thyroid function. Iodine deficiency is responsible for endemic goiter, and certain types of cretinism it can be avoided by addition of iodides to drinking water. Other T. e. are chromium, copper, fluoride, magnesium, manganese, nickel, vanadium, silicon, tin, selenium, zinc (see individual entries). 

Molten lithium fluoride and sodium chloride have easily measured electrical conductivities. Nevertheless, these conductivities are lower than metallic conductivities by several factors of ten. Molten sodium chloride at 750°C has a conductivity about IQ-5 times that of copper metal at room temperature. It is unlikely that the electric charge moves by the same mechanism in molten NaCl as in metallic copper. Experiments show that the charge is carried in molten NaCl by Na+ and Cl- ions. This electrical conductivity of the liquid is one of the most characteristic... 

A variety of metal sulfides and their mixtures have been employed to improve the friction stability, wear, and noise characteristics of friction materials. Commonly used sulfides are antimony trisulfide, molybdenum disulfide, tin sulfides, zinc sulfide, copper sulfides, titanium sulfide, and bismuth trisulfide. Sulfide lubricants are usually used to complement carbonaceous lubricants. Fluoride and molybdate additives are sometimes used to enhance the action of carbonaceous and sulfide lubricants. Examples of fluorides are calcium fluoride and cryolite. Sodium and calcium molybdates have been used in small amounts. 

---