89.0 Y; atomic See also:

• WEIGHT

weight See also:

• 89.0 Y; atomic weight YTTRIUM [symbol (0 =16)]

YTTRIUM [See also:

• SYMBOL (Gr. o-uµ(3oXov, a sign)

symbol (0 =16)]  , a metallic chemical See also:

• ELEMENT (Lat. elementum)

element . In its See also:

• CHARACTER (Gr. xapareri7p, from xap&crew, to scratch)

character See also:

• YTTRIUM [symbol, Y; atomic weight, 89.0 (0 =16)]

yttrium is closely allied to, and in nature is always associated with, See also:

• CERIUM (symbol Ce, atomic weight 140.25)

cerium, lanthanum, See also:

• DIDYMIUM (from the Gr. &Segos, twin)

didymium and See also:

• ERBIUM (symbol, Er; atomic weight, 165-166)

erbium (see RARE EARTHS) . For the preparation of yttrium compounds the best raw material is gadolinite, which, according to See also:

• KONIG, KARL RUDOLPH (1832-1901)

Konig, consists of 22.61% of See also:

• SILICA

silica, 34.64 of yttria, Y203, and 42.75 of the oxides of erbium, cerium, didymium, lanthanum, See also:

• IRON [symbol Fe, atomic weight 55.85 (0=16)]

iron, See also:

• BERYLLIUM

beryllium, See also:

• CALCIUM [symbol Ca, atomic weight 40.0 (o= x6)]

calcium, See also:

• MAGNESIUM [symbol Mg, atomic weight 24.32 (0 = 16)]

magnesium and See also:

• SODIUM [symbol Na, from Lat. natrium; atomic weight 23.00 (0=16)]

sodium . The extraction (as is the See also:

• CASE
• CASE, JOHN (d. 1600)

case with all the rare earths) is a See also:

• MATTER

matter of See also:

• GREAT

great difficulty . Metallic yttrium is obtainable as a dark See also:

• GREY, CHARLES GREY, 2ND EARL (1764-1845)
• GREY, HENRY GREY, 3RD EARL (1802-1894)
• GREY, LADY JANE (1537-1554)
• GREY, SIR EDWARD
• GREY, SIR GEORGE (1812–1898)

grey See also:

• POWDER (through O. Fr. puldre, modern poudre, from Lat. pulvis, pulveris, dust)

powder by reducing the chloride with See also:

• POTASSIUM [symbol K (from kalium), atomic weight 39.114 0=16)]

potassium, or by electrolysing the See also:

• DOUBLE
• DOUBLE (from the Mid. Eng. duble, the form which gives the present pronunciation, through the Old Er. duble, from Lat. duplus, twice as much)

double chloride of yttrium and sodium . It decomposes See also:

• WATER

water slowly in the See also:

• COLD (in O. Eng. cald and ceald, a word coming ultimately from a root cognate with the Lat. gelu, gelidus, and common in the Teutonic languages, which usually have two distinct forms for the substantive and the adjective, cf. Ger. Kolte, kalt, Dutch koude

cold, and more rapidly on See also:

• HEATING

heating . Yttria, Y203, is a yellowish See also:

• WHITE
• WHITE, ANDREW DICKSON (1832– )
• WHITE, GILBERT (1720–1793)
• WHITE, HENRY KIRKE (1785-1806)
• WHITE, HUGH LAWSON (1773-1840)
• WHITE, JOSEPH BLANCO (1775-1841)
• WHITE, RICHARD GRANT (1822-1885)
• WHITE, ROBERT (1645-1704)
• WHITE, SIR GEORGE STUART (1835– )
• WHITE, SIR THOMAS (1492-1567)
• WHITE, SIR WILLIAM ARTHUR (1824--1891)
• WHITE, SIR WILLIAM HENRY (1845– )
• WHITE, THOMAS (1628-1698)
• WHITE, THOMAS (c. 1550-1624)

white powder, which at high temperatures radiates out a most brilliant white See also:

• LIGHT

light . It is soluble, slowly but completely, in See also:

• MINERAL

mineral acids . It is recognized by its very characteristic spark spectrum . Solutions of yttria salts in their behaviour to reagents are not unlike those of zirconia . The atomic See also:

• WEIGHT

weight was determined by Cleve .