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Search title: Andrew McCalip on Twitter: "Meissner effect or bust. Day 2 An absolute emotional rollercoaster. We've been back so many times, I've lost count The first reaction to make Lanarkite (PbO + PbSO4) is running in the furnace! We opted to do 80% in an open air alumina crucible and 20% in a sealed quartz tube https://t.co/7km6Lc1C1Y" / Twitter
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