Tron (from the Arabic name for the natural salt) [1] - mineral , chemical composition of Na 2 CO 3 · NaHCO 3 · 2H 2 O. Another name is Egyptian salt .
It was known five thousand years ago as one of the embalming components of the Egyptian pharaohs.
The chemical name of the salt is sodium sesquicarbonate.
Content
Properties
It occurs in nature in the form of crystalline crusts, sometimes imperfect plate crystals [1] .
The color is white, yellow, sometimes colorless.
The crystals belong to monoclinic syngony , a type of symmetry L 2 PC.
Cleavage is very perfect.
Hardness 2.5.
The specific gravity of 2.17.
In air, unlike sodium , it does not erode.
Raw materials for the production of soda .
Origin and associated minerals
In nature, mineral deposits are found in the USA , Libya , China , Mongolia , in the steppes of Kazakhstan , in Western Siberia and on the Kola Peninsula [2] .
Satellites: thermonatrite Na 2 CO 3 · H 2 O, mirabilite Na 2 SO 4 · 10H 2 O, tenardite Na 2 SO 4 , sodium . However, they contain more than 50% impurities that do not allow to obtain the mineral for industrial needs in its pure form. More recently, science has classified the mineral as poorly understood and not amenable to modeling.
Notes
Literature
Smolyaninov N.A. Practical Guide to Mineralogy.// Ed. 2nd, rev. and add. // Scientific. ed. B. E. Karsky. M .: "Nedra", 1972. 360 p.