To convert a signed binary int to a decimal number, use the following algorithm. We illustrate the algorithm on two four-bit examples: 1110 and 0101. If the leftmost bit is a 1, the number is negative. Do the following... (1110 starts with a 1.
Copper pyrites is a common name for the mineral chalcopyrite, which has a formula CuFeS2. It can be considered to be made up of Cu+ Fe3+ S2- ions but there is covalent character.
Chalcopyrite is a fairly common mineral, and therefore only the finest of localities will be mentioned. Large, well shaped crystals occur in numerous places in Cornwall, England, especially at the Carn Brea area. Baia Sprie (Felsobanya) and Kapnick both in Maramures Co., are famous Romanian occurrences.