the dolomite and andesite contacts enabling the formation of lorandite deposits. Applications In 1976, it was proposed to use a thallium-rich mineral, lorándite, for detection of solar neutrino. The method relies on the 205Tl(νe,e−)205Pb reaction, which has a relatively low threshold energy of 52 keV and thus relatively high efficiency. This reaction yields 205Pb isotope which has a long lifetime of 15.4 million years; it is induced not only by neutrinos, but also by other cosmic particles. They all have different penetration depths in the Earth's crust, and thus analysis of the 205Pb content in a thallium-containing ore taken from different depths brings information on the neutrinos of the past millennia. Thus, the LORandite EXperiment (LOREX), is running between 2008 and 2010 and is based in one of the largest source of lorandite, the Allchar deposit in southern North Macedonia. See also Hutchinsonite References External links Spectroscopic data for lorandite Thallium minerals Arsenic minerals Sulfosalt minerals Monoclinic minerals Minerals in space group 14