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SUMMARY:Medium-density Amorphous Ice
LOCATION:Chemistry A101
TZID:America/Denver
DTSTART:20251113T160000
UID:2026-06-01-14-32-21@natsci.colostate.edu
DTSTAMP:20260601T143221
Description:About the seminar:\n\nAmorphous ices govern a range of cosmolog
 ical processes and are potentially key materials for explaining the anomal
 ies of liquid water. A substantial density gap between low-density and hig
 h-density amorphous ice with liquid water in the middle is a cornerstone o
 f our current understanding of water. However\, we show that ball milling 
 “ordinary” ice Ih at low temperature gives a structurally distinct me
 dium-density amorphous ice (MDA) within this density gap. These results ra
 ise the possibility that MDA is the true glassy state of liquid water or a
 lternatively a heavily sheared crystalline state. Notably\, the compressio
 n of MDA at low temperature leads to a sharp increase of its recrystalliza
 tion enthalpy\, highlighting that H2O can be a high-energy geophysical mat
 erial. 4:00 pm
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