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Ice543: P drop bi-sample f.g. ice I + 5-micron SiO2

Top: Pulverized sample 541 + 5-micron SiO2, mass ratio 4:1    
Bottom: Repulverized (by Oz) sample 542    
Conditions:    
200 K    
I --> II at P = 265 MPa, had two plateaux!    
42 min as ice II, most at 240-250 MPa, peak 270 MPa    
P drop from 255 MPa    
Fine-grained ice I fabrication by pressure drop from >240 MPa.

Read notes from run log here

micrographs