Synthetic Fluorescent Mineral Experiment: Carbonated Pseudo Schrockingerite - UVc

FOV: 3" wide.

Uranyl nitrate solution was used to hydrate 15mL of DAP Plaster of Paris mix. The result showed hardly any green uranyl fluorescence, what could be seen was yellowish green. The plaster was then rehydrated using a concentrated sodium carbonate solution. The water was evaporated and the mixture was then calcined at ~150 degC for 4 hours in an oven. It was then rehydrated using a sodium carbonate solution. The plaster mix bubbled for about a half hour releasing much CO2 gas. After drying a coating of yellowish crystals formed on the surface.

See:
rruff.info/uploads/CM31_167.pdf

Compare to:
www.mindat.org/photo-299521.html

Contains:
Pseudo Schrockingerite (FL Blue-green >BL/UVabc)

Shown under UVc light.

Key:
WL = White light (halogen + LED)
FL = Fluoresces
PHOS = Phosphorescent
Blue = 450nm,
UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)
'>' = "stimulated by:", '!' = "bright", '~' = "dim"

Carbonated Pseudo Schrockingerite
14Nov2015

Much appreciation to Gordon Czop for the uranyl nitrate.

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