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THE SYSTEM R 2 O‐B 2 O 3 , II
Author(s) -
Cole S. S.,
Scholes S. R.,
Amberg C. R.
Publication year - 1935
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1935.tb19353.x
Subject(s) - anhydrous , chemistry , monoclinic crystal system , sodium , potassium , inorganic chemistry , boric acid , potassium hydroxide , hydrate , dehydration , alkali metal , melting point , nuclear chemistry , crystallography , crystal structure , biochemistry , organic chemistry
The melting points and the optical and mineralogical properties of potassium metaborate, sodium metaborate, and hydrated sodium metaborate are reported. The hydrated sodium metaborate was produced by a wet method from sodium hydroxide and boric acid as well as by hydration of the fusion product. The sodium and potassium metaborates were formed by dry fusion of Na 2 CO 3 or K 2 CO 3 and H 3 BO 3 and by dehydration of the hydrated form. The anhydrous metaborates formed hexagonal crystals and the hydrated salt is monoclinic. X‐ray diffraction data for Na 2 O.B 2 O 3 are reported and the unit cell is calculated as a o = 6.85 Å, c o = 10.95 Å, c/a = 1.60.