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just some xtals

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Results of dissolving spice in dilute HCl, basing and pulling at room temp. It's faster and less effort than a mini a/b and saves solvent. I get this result quite consistently.
 

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Orion said:
Results of dissolving spice in dilute HCl, basing and pulling at room temp. It's faster and less effort than a mini a/b and saves solvent. I get this result quite consistently.
Click to expand...
Pardon my ignorance, but what is the difference between the steps described here and a "mini a/b"?
 
NormPeterson said:
Pardon my ignorance, but what is the difference between the steps described here and a "mini a/b"?
Click to expand...

In a standard mini a/b you would add acidified water to the non-polar solvent pulls before precipitation. You salt out the spice, base the acidified phase and pull it again. Sometimes the crystalline spice will be redissolved in fresh solvent before being salted back out, based and pulled.

This just goes straight from crystal to acidified water which is then based and pulled.
 
A slide was placed on a hot plate, just above melting point. A small pile of crushed crystals were added and melted into a puddle. The slide was removed and placed on the microscope, and a cold slide was placed on top to spread the drop and seal it. I think not warming the top slide led to more rapid nucleation, in absence of its heat source. As the crystals grew out of their melt, they secreted bubbles of gas? water? that must have been trapped.

View attachment xtals.mp4
 
Transform said:
Do we have some idea of the size and geometry of those wonderful specimens?
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Under 1mm wide and about 2mm long. I got one photo looking down a long axis and it looks like one is hexagonal, with a bisection, or two trapezoids. Another just above it looks like a trapezoid attached to a triangular prism to make a 5-sided column.
IMG_0149.jpgIMG_0124.jpg
 
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