Three samples of biochar 1 (spruce) imaged with nanofocus tube during freeze-thaw cycles. Nano1 and nano2 were frozen 2-3 times, nano3 25 times. Collective project preview entry: https://doi.org/10.23729/c6c8168e-1feb-472d-969b-bb8bdadcb609 Preview dataset found at https://doi.org/10.23729/4eed8497-cff3-41c0-9ccc-24bb67476d5f . To obtain data, please contact fairdata-pas@gtk.fi .

2023