in absence of bacterium 4-5 months: in presence of bacterium 2 weeks
||Bacteria Shewanella oneidensis MR-1
||Olivia P. Judson, The energy expansions of evolution, Nature ecology & evolution, 28 April 2017 | Volume: 1 | Article number: 0138 p.2 right column 3rd paragraph
|| Kim J, Dong H, Seabaugh J, Newell SW, Eberl DD. Role of microbes in the smectite-to-illite reaction. Science. 2004 Feb 6 303(5659):830-2. DOI: 10.1126/science.1093245PubMed ID14764877
||P.2 right column 3rd paragraph: "Many life-mediated accelerations also include huge improvements in the temperatures and pressures at which reactions can occur. For example: the smectite-to-illite reaction, a transformation between two clay minerals. In the absence of microbial involvement, this transformation requires 4–5 months at 300 °C and high pressure (1,000 atmospheres). In the presence of the bacterium Shewanella oneidensis, the same reaction takes just two weeks— at room temperature and one atmosphere (primary source)."