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EGYPTIANS, NOT GREEKS WERE TRUE FATHERS OF MEDICINE

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Author Topic: EGYPTIANS, NOT GREEKS WERE TRUE FATHERS OF MEDICINE  (Read 16393 times)
Bianca
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« Reply #15 on: July 29, 2007, 05:56:22 pm »








                                                           N A T R O N




Natron is a naturally occurring mixture of hydrated sodium carbonate (soda ash, Na2CO3·10 H2O) and about 17% sodium bicarbonate (baking soda, NaHCO3) along with small quantities of household salt (sodium chloride) and sodium sulfate. Natron is white to colorless when pure, varying to gray or yellow with impurities. Natron deposits occur naturally as a part of saline lake beds in arid environments. Historically natron had many practical applications which still resonate in the wide modern use of its constituent mineral components.

 

 Etymology

The English word natron is a French cognate derived from the Spanish natrón through the Arabic natrun from Greek nitron. The modern chemical symbol for sodium, Na, is an abbreviation of that element's new Latin name natrium, which was derived from natron.



 Chemical properties

Natron has a specific gravity of 1.42 to 1.47 and a Mohs hardness of 1. It crystallizes in the monoclinic crystal system, typically forming efflorescences and encrustations. Natron effloresces (loses water) in dry air and is partially transformed into the monohydrate thermonatrite, Na2(CO3)·(H2O). The mineral is often found in association with thermonatrite, trona, mirabilite, gaylussite, gypsum and calcite.
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