Fig. 2: Hydrated Na,Ca carbonate.
From: An evaporite sequence from ancient brine recorded in Bennu samples
a, Na,Ca carbonate grain, studied about 1 month following removal from nitrogen storage in the curatorial facility, exhibits SAED d-spacing consistent with the hydrated phases gaylussite or pirssonite. The mineral is sensitive to beam damage (dark spot within grain), consistent with a hydrated phase (multielement Kα X-ray map; sample no. OREX-800045-102). b, NaCl particles grown on the same grain after 5 months (multielement Kα X-ray map). Scale bars, 200 nm.
