Old 05-11-2018, 01:31 PM #1
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Default (A) Mineral phosphorescence

Often I use my 405 nm laser to see if it induces phosphorescence. Many do such as gypsum, titanium dioxide all of which give off a pale white light for a short time after excitation. But yesterday I found a mineral of some type that glows orange briefly.



Last edited by steve001; 05-11-2018 at 01:35 PM.
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Old 05-11-2018, 06:18 PM #2
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Default Re: (A) Mineral phosphorescence

Minerals like Sodalite and Tugtopite emit orange
when excited. Look to contact our member "Daguin"
about this. He is a rock hound for these things. He
sent me some samples several years ago.
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Old 05-11-2018, 08:05 PM #3
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Default Re: (A) Mineral phosphorescence

Quote:
Originally Posted by Hemlock_Mike View Post
Minerals like Sodalite and Tugtopite emit orange
when excited. Look to contact our member "Daguin"
about this. He is a rock hound for these things. He
sent me some samples several years ago.
HM
Thanks. I may via here post a photo of this rock and ask Daquin to maybe ID it.
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Old 05-11-2018, 08:38 PM #4
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Default Re: (A) Mineral phosphorescence

I was a rock hound when I was a kid for many years. I used a black light back then to help identify some minerals that would fluoresce or phosphoresce. I passed on all my rocks and crystals to my daughter many years ago. But, she never shared my excitement of finding a new mineral or crystal and correctly identifying it.
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Old 05-11-2018, 11:37 PM #5
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Default Re: (A) Mineral phosphorescence

Quote:
Originally Posted by Hemlock_Mike View Post
Minerals like Sodalite and Tugtopite emit orange
when excited. Look to contact our member "Daguin"
about this. He is a rock hound for these things. He
sent me some samples several years ago.
HM
Quote:
Originally Posted by paul1598419 View Post
I was a rock hound when I was a kid for many years. I used a black light back then to help identify some minerals that would fluoresce or phosphoresce. I passed on all my rocks and crystals to my daughter many years ago. But, she never shared my excitement of finding a new mineral or crystal and correctly identifying it.
The mineral in question it nearly opaque off white. I noticed when heated by the laser there is the smell of burnt gunpowder.
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Old 05-12-2018, 12:46 AM #6
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Default Re: (A) Mineral phosphorescence

The blacklight I had for fluorescing minerals was UVC in the range of 100nm to 280nm. Many minerals that will fluoresce under UVC won't under UVA. like 400nm. The only thing that I can think of that might smell like gunpowder is KNO3. I don't know if any of its types in nature fluoresce, though.
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Old 05-12-2018, 12:48 AM #7
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Default Re: (A) Mineral phosphorescence

I have some from Franklin New Jersey that glows oranged for a few seconds. I should film it.
Took this one of a piece of calcite last year.
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Old 05-12-2018, 12:53 AM #8
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Default Re: (A) Mineral phosphorescence

I have a large piece of Icelandic Calcite, but it doesn't fluoresce at all. It is highly birefringent, though.
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