(1979) found that in an assumed Al-conservative alteration of granitic biotite to chlorite there was a 13% volume de-crease, and that Mg2+ and Fe2+ ions were added. Veblen and Ferry (1983) examined the partially chloritized biotite described by Ferry (1979) using transmission electron mi-croscopy. They showed that alteration to chlorite pro-
Part of the Internet technologies glossary: Bitcoin is a digital currency (also called crypto-currency) that is not backed by any country's central bank or government.Bitcoins can be traded for goods or services with vendors who accept Bitcoins as payment.art of the Internet technologies glossary: Bitcoin is a digital currency (also called crypto-currency) that is not backed by any country's central bank or government.
The answer is nothing at all, but thatâs actually not a bad thing. Like most modern currencies bitcoin is not backed by gold or other precious commodities. In a sense, bitcoinâs value is derived from our common belief that bitcoin has value. The same is true of the American dollar, the British pound, and the European Unionâs euro, as well as nearly every other modern currency.