Synthetic Fluorescent Mineral Experiment: Bologna Stone Blobs Comparison - PHOS

FOV: 5" wide.

 

Frozen melted salt containing the Bologna Stone phosphor showing different methods of production. Melted on a copper tray and allowed to flow off tray.

 

Left sample: No carbon, 1/2 as much BaSO4, ~5ml barium hydroxide sol. - BaSO4 melted into salt too fast. Did not get hot enough to incandesce.

 

Center sample: Carbon (sugar), mixed well, no barium hydroxide sol. - Half remained stuck to tray.

 

Right sample: Carbon, salt separated (on bottom), ~8 drops barium hydroxide sol. - BaSO4 heated well and incandesced before melting into salt and flowing off tray completely.

 

Suspected phosphors: BaO?, BaS:Cu+ in NaCl

 

Contains:

BaS:Cu+ (FL+PHOS! Orange, >BL UVabc)

 

Ba(OH)2 sol. (added as flux)

 

Shown in phosphorescent state after exposure to UVabc light.

 

Key:

WL = White light (halogen + LED)

FL = Fluoresces

PHOS = Phosphorescent

BL = 450nm,

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

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

 

Bologna Stone Blobs Comparison

16Sep2015

 

Series best viewed in Light Box mode using Right and Left arrows to navigate.

Photostream best viewed in Slideshow or Lightbox mode (in the dark).

 

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

Done