Initial studies of the ability of silicate bacteria to break down smectite minerals used four smectite specimens from the Askani clay deposit, Georgia. They were subjected to quantitative chemical, as well as by X-ray and ...
The characteristic hypogene mineralization in silver deposits is represented by silver sulfosalts (pyrargyrite, freibergite, polybasite, stephanite, or stromeyerite) in addition to galena, sphalerite, chalcopyrite and ...