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Au
Gold


Atomic no.:
79
Atom. weight: 196.96654
Density: 19.32
Class:
noble metal
Melting point: 1064°C
Boiling point: 2808°C
Colour: Array
   
Discoverer: ?
Place: Warnasee/
Bulgaria
Year: Ancient times

This metal has been known since prehistoric times Gold is a soft metal with a characteristic yellow color. It is the most malleable and ductile of any element. It is unaffected by air, water, alkalis and acids, with the exception of "aqua regia", HNO3/HCl. The fact that it is chemically unreactive means that it is often found in its natural state. It is a good thermal and electrical conductor and has excellent reflective properties to both light and infrared. It has an abundance in the earth's crust of 0.0011 ppm. Most of the metal is retained for use as bullion reserves, but some is used within the electronics and jewellery industries, where it is frequently alloyed with other elements to improve the mechanical properties of the metal (e.g. copper and silver). Other uses for the metal are as a heat reflecting coating for glass as well as as a decorative medium.

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 Nice Gold doped glass bead - Gold ruby glass. NEW!  Art. Nr. 005025  
Nice Gold doped glass bead - Gold ruby glass. NEW!
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Glass bead doped with Gold Nanoparticles

Material: BaP:0.1 Au

Size about 10mm - Weight ~ 1.0g

Nice glass bead. Each one handmade of phosphate glass in our lab.

Gold ruby glass.
Unlike other colored glass it's color comes from gold nano crystals. Normally silicate glass is used for this but I wanted to use optical barium phosphate glass. The first attempts failed and I got a colorless glass with tiny gold droplets inside. Then after fine adjusting the ingredients and temperature I got a water clear and colorless glass melt which suddenly turned deep red within a few seconds on cooling down to 500 deg. C 

Amount: 1 St. / 1 pc.
Purity : --
Packing: ampoule
40.00
- tax free

Availability: 4 in stock

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