Definitions for herapathite
her·a·p·athite

WiktionaryRate this definition:0.0 / 0 votes

1. herapathitenoun

   Iodoquinine sulfate, a chemical compound whose crystals are dichroic and thus can be used for polarizing light.

WikipediaRate this definition:0.0 / 0 votes

1. Herapathite

   Herapathite, or iodoquinine sulfate, is a chemical compound whose crystals are dichroic and thus can be used for polarizing light. It was discovered in 1852 by William Bird Herapath, a Bristol surgeon and chemist. One of his pupils found that adding iodine to the urine of a dog that had been fed quinine produced unusual green crystals. Herapath noticed while studying the crystals under a microscope that they appeared to polarize light.In the 1930s, Ferdinand Bernauer invented a process to grow single herapathite crystals large enough to be sandwiched between two sheets of glass to create a polarizing filter; these were sold under the Bernotar name by Carl Zeiss. Herapathite can be formed by precipitation by dissolving quinine sulfate in acetic acid and adding iodine tincture.Herapathite's dichroic properties came to the attention of Sir David Brewster, and were later used by Edwin H. Land in 1929 to construct the first type of Polaroid sheet polarizer. He did this by embedding herapathite crystals in a polymer instead of growing a single large crystal. Structurally, herapathite consists of quinine (in a cationic doubly-protonated ammonium form), sulfate counterions, and triiodide units, all as a hydrate. They combine as 4C20H26N2O2•3SO4•2I3•6H2O, or sometimes other ratios and higher polyiodides.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Herapathitenoun

   the sulphate of iodoquinine, a substance crystallizing in thin plates remarkable for their effects in polarizing light

2. Etymology: [Named after Dr. Herapath, the discoverer.]

WikidataRate this definition:0.0 / 0 votes

1. Herapathite

   Herapathite, or iodoquinine sulfate, is a chemical compound whose crystals are dichroic and thus can be used for polarizing light. According to Edwin H. Land, it was discovered in 1852 by William Bird Herapath, a Bristol surgeon and chemist. One of his pupils found that adding iodine to the urine of a dog that had been fed quinine produced unusual green crystals. Herapath noticed while studying the crystals under a microscope that they appeared to polarize light. Prof. Ferdinand Bernauer invented a process to grow single herapathite crystals large enough to be sandwiched between two sheets of glass to create a polarizing filter. These were sold under the Bernotar name by Carl Zeiss. This method has since been lost. Herapathite's dichroic properties came to the attention of Sir David Brewster, and were later used by Land in 1929 to construct the first type of Polaroid sheet polarizer. He did this by embedding herapathite crystals in a polymer instead of growing a single large crystal.

How to pronounce herapathite?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say herapathite in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of herapathite in Chaldean Numerology is: 5

2. Pythagorean Numerology

   The numerical value of herapathite in Pythagorean Numerology is: 3

References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Herapathite
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Herapathite
3. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/herapathite
4. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=herapathite