(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.
Bitcoin is a decentralized cryptocurrency that offers pseudonymity to its users. Although a Bitcoin has no intrinsic value, it's becoming an increasingly popular form of digital currency, attracting venture capitalist attention, from Fred Wilson of Union Square Ventures to the Winklevoss twins. There is a limited supply of Bitcoins, 21 million in total, with 11 million currently in circulation. While Bitcoin allows you to keep your identity concealed, the block chain acts as a public ledger of every Bitcoin transaction.