Source: Mostly from Bolivia but bismuth is also found
as a by-product of the refining process of some metals.
Chemical: Bi ( a single element all to its own
)
Crystal System: Trigonal although rarely seen in
crystal form
Formation: In hydrothermal vents and pegmatite
dikes most often.
Unusual Properties: Bismuth has some interesting attributes.
First is the irridescent colors that it shows on its surface due
to oxidation. (see above) Most notable is that it fuses and melts
at a very low temperature. Which is why it is often used for boiler
plugs to prevent blow-ups from pressure. Before the boiler will
get hot enough to blow up the bismuth plug will melt and blow
out. Same for fire sprinkler systems. The heat of a fire will
melt a bizmuth plug very quickly and start the sprinkler system
before the fire gets out of control. Also for electrical fuses
because it will melt before the current gets too high and causes
damage.
Perhaps one note to ponder....bizmuth
carbonate has been used to treat diarrhea. But due to some toxic
reactions from some patients it is not used much anymore. Think
I'll stick with the ol' Kaopectate. |
Bismuth