Browsing Bergen Open Research Archive by Author "Vullum, Per Erik"
Now showing items 1-2 of 2
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Atomic resolution imaging of beryl: an investigation of the nano-channel occupation
Arivazhagan, V.; Schmitz, F.D.; Vullum, Per Erik; Van Helvoort, Antonius; Holst, Bodil (Peer reviewed; Journal article, 2016)Beryl in different varieties (emerald, aquamarine, heliodor etc.) displays a wide range of colours that have fascinated humans throughout history. Beryl is a hexagonal cyclo-silicate (ring-silicate) with channels going ... -
On the biogenicity of Fe-oxyhydroxide filaments in silicified low-temperature hydrothermal deposits: Implications for the identification of Fe-oxidizing bacteria in the rock record
Johannessen, Karen Cecilie; McLoughlin, Nicola; Vullum, Per Erik; Thorseth, Ingunn Hindenes (Peer reviewed; Journal article, 2020)Microaerophilic Fe(II)‐oxidizing bacteria produce biomineralized twisted and branched stalks, which are promising biosignatures of microbial Fe oxidation in ancient jaspers and iron formations. Extracellular Fe stalks ...