Cooperative Institute for Research in Environmental Sciences

Analytical Chemistry Seminar: Katie Primm

Analytical Chemistry Seminar: Katie Primm

Analytical & Environmental Chemistry Division and Atmospheric Chemistry Program Seminar

Jointly sponsored by the Department of Chemistry and Biochemistry, CIRES, and the Environmental Program

Supercooling and ice formation of perchlorate and chloride brines under Mars-relevant conditions

by Katie Primm - Department of Chemistry and Biochemistry-CIRES, University of Colorado Boulder

Perchlorate and chloride salts, discovered in the Martian regolith at multiple landing sites, may provide pathways for liquid water stability on current Mars. It has previously been assumed that perchlorate and chloride brines form in the Martian regolith via melting or deliquescence, they would be present only briefly because efflorescence into a crystal or freezing to ice would soon occur. Here, we used a Raman microscope to study the temperature and relative humidity (RH) conditions at which magnesium perchlorate and magnesium chloride brines will deliquesce into aqueous droplets, form ice, and effloresce back into crystalline particles.

location

CIRES Fellows Room, Ekeley S274