argyrium - 27-4-2016 at 10:19
A "new" form of MgCO3.
Looks to be relatively easy to make if a suitable pressure vessel is on hand (3 bars).
Two links:
http://journals.plos.org/plosone/article?id=10.1371/journal....
http://www.disruptivematerials.com/upsalite/
"Upsalite has a surface area of 800 square meters (8611 sq ft), the highest measured surface area for an alkali earth metal"