Luminescence Alchemy: "Jack-o-lite" from local calcite - UVc

 

FOV: 3" wide.

 

Calcium sulfide made by heating calcium carbonate with hardware store sulfur in molten salt (aka "Jack-o-lite"). The calcium carbonate came from local rockshop calcite that fluoresced orange under UVa possibly due to cerium impurities. A small amount of MnCl2 was added before the salt mixture was melted. The in-homogeneous color demonstrates the high sensitivity the fluroescence has to impurities.

 

Contains:

CaS:Mn2+ (FL+PHOS Orange,Pink >UVbc)

 

Shown under UVc light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosporescent

UVa = 368nm (LW), UVb = 311nm (MW), UVc = 254nm (SW)

'>' = "stimulated by:", '!' = "bright", '~' = "dim"

 

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18 Watt Triple Output UV lamp from Polman Minerals - Way Too Cool UV lamps

 

...\FL min Experiments\Group II Sulfides\CaS salt HRS MnCl2

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