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Precious metal doped crystals for hardening of the crystals

  • US 4,955,699 A
  • Filed: 11/23/1988
  • Issued: 09/11/1990
  • Est. Priority Date: 10/28/1987
  • Status: Expired due to Term
First Claim
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1. A crystalline structure selected from the group consisting of thallium arsenic selenide, thallium arsenic sulfide, thallium vanadium sulfide, thallium phosphorous selenide, lead halide, and mixtures thereof, where said crystalline structure is doped by a precious metal selected from the group consisting of copper, silver, gold and mixtures thereof, in an amount of about 25 ppm by weight up to about 3 ppm by weight.

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