sb. Chem. Also 8 fluat. [mod. f. FLU(ORIC) + -ATE.]
1. Chem. A name formerly given to the salts now called fluorides, which were supposed to result from the combination of fluoric acid with an oxide. Fluate of lime = Derbyshire spar, or FLUOR SPAR.
1794. G. Adams, Nat. & Exp. Philos., I. App. 546. Fluats—when heated phosphoresce, and combine with silica—sparingly soluble in water.
1806. Davy, in Phil. Trans., XCVII. 14. I made an experiment upon fluate of lime under like circumstances.
1849. Mrs. Somerville, Connect. Phys. Sc., xxv. 243. Limpid and colourless fluate of lime.
2. A hydrofluosilicate applied to building-stone with the view of rendering it harder and more durable. Hence Fluate v. trans., to treat with fluate; Fluated ppl. a.; Fluating vbl. sb.; also Fluatate v. trans. and Fluatation.
1887. Sci. Amer., 28 May, 344. Fluatation. The surface of the stone is covered to the desired degree with a solution of the fluate…. After the stone has been once fluated, it becomes so hard that it can be treated like marbles and porphyries…. After the stone has been once fluatated, it can be easily rendered impermeable.
1893. R.I.B.A. Jrnl., 16 March, p. iii. The fluating will render it [Bath Stone] as durable as the most expensive stones … Fluated Bath Stone.
