[Rockhounds] Heavy Water in the Bucket (OT)

[Axel Emmermann]

> Tritium is used to make glow-in-the-dark gun sights. 

[Axel] And luminescent road signs for military vehicles. Yes, we used a
couple of those on a field trip. We were looking for fluorescent minerals at
the Plombieres locality (red fl calcite, blue fl hydrozincite, yellow fl
gypsum and green fl willemite). It's a rather tricky place to stroll around
at night ;-)))
On of the group members was a high ranking Belgian army officer. He brought
the signs.

Cheers
Axel