TY - JOUR T1 - Vivianite and siderite in lateritic iron crust: an example of bioreduction JO - QuĂ­mica Nova A1 - Lemos, Vanda Porpino A1 - Costa, Marcondes Lima da A1 - Lemos, Ronaldo Lima A1 - Faria, Mario Sergio Gomes de SN - 0100-4042 UL - 10.1590/S0100-40422007000100008 VL - 30 Y1 - 2007 PB - Brasil ER -