2019
DOI: 10.3749/canmin.1700074
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MÖssbauer Study of Changes in Olivine After Heating in Air

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Cited by 7 publications
(4 citation statements)
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“…Current hypothesis suggests that Mg-rich olivine (forsterite) has precipitation of magnetite Fe 3 O 4 (Fe 2+ Fe 3+ 2 O 4 ) along the defects and crystallite boundaries, similar to those observed in volcanic olivines at 600 • C and 900 • C HTA under O 2 environment [5]. Complex phase modifications between Fe-oxides and silicates are expected including formation of magnetic FeO which has IR active absorption bands [6,7].…”
Section: Introductionmentioning
confidence: 68%
“…Current hypothesis suggests that Mg-rich olivine (forsterite) has precipitation of magnetite Fe 3 O 4 (Fe 2+ Fe 3+ 2 O 4 ) along the defects and crystallite boundaries, similar to those observed in volcanic olivines at 600 • C and 900 • C HTA under O 2 environment [5]. Complex phase modifications between Fe-oxides and silicates are expected including formation of magnetic FeO which has IR active absorption bands [6,7].…”
Section: Introductionmentioning
confidence: 68%
“…However, olivine diffraction lines are still visible on the X-ray diffractogram after heating the sample to 1000 o C. It can suggest that at this temperature we have forsterite in the sample. Augite structure is much more stable at high temperatures in comparison to olivine (Khisina et al 2005;Kądziołka-Gaweł et al 2019). Small changes observed for this compound are oxidation of Fe 2+ ions to Fe 3+ ions.…”
Section: Ismentioning
confidence: 85%
“…Additionally, the result of annealing the sample at 500 o C is appearance of ferric doublet with hyperfine parameters IS = 0.41 mm/s and QS = 0.92 mm/s on Mössbauer spectrum. This component can be related to the formation of superparamagnetic nanoparticles of Fe 2 O 3 (Brown et al 1998;Barcova et al 2003;Rivas-Sanchez et al 2009) as a result of oxidation of Fe 2+ ions in the olivine structure (Kądziołka-Gaweł et al 2019). It indicates that the decomposition of the olivine structure starts at this temperature.…”
Section: Discussionmentioning
confidence: 96%
“…We show here that olivine in xenoliths becomes magnetized after high-temperature annealing (HTA) above 1300 • C in O 2 flow. Current hypotheses suggest that Mg-rich olivine (forsterite) has precipitations of magnetite Fe 3 O 4 (Fe 2+ Fe 3+ 2 O 4 ) along the defects and crystallite boundaries, similar to those observed in volcanic olivines at 600 • C and 900 • C HTA under an O 2 environment [7]. Complex phase modifications between Fe oxides and silicates can be expected, including formation of magnetic FeO, which has active IR absorption bands [1,2].…”
Section: Introductionmentioning
confidence: 82%