HARMOTOME  , a See also:

• MINERAL

mineral of the zeolite See also:

• GROUP

group, consisting of hydrous See also:

• BARIUM (symbol Ba, atomic weight 137'37 [0=16])

barium and See also:

• ALUMINIUM (symbol Al; atomic weight 27.0)

aluminium silicate, H2BaAl2(SiO3)5+5H20 . Usually a small amount of See also:

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

potassium is See also:

• PRESENT

present replacing See also:

• PART

part of the barium . The See also:

• SYSTEM

system of See also:

• CRYSTALLIZATION

crystallization is See also:

• MONOCLINIC

monoclinic; only complex twinned crystals are known . A See also:

• COMMON

common and characteristic See also:

• FORM (Lat. forma)

form of twinned crystal, such as is represented in the figure, consists of four intercrossing individuals twinned together according to two twin-See also:

• LAWS

laws; the See also:

• COMPOUND
• COMPOUND (from Lat. componere, to combine or put together)

compound group resembles a tetragonal crystal with See also:

• PRISM (Gr. rrpivµa, properly a thing sawn, Irpii"ety, to saw)

prism and See also:

• PYRAMID

pyramid, but may be distinguished from this by the grooves along the edges of the pseudo-prism . The faces of the crystals are marked by characteristic striations, as indicated in the figure . Twinned crystals of exactly the same See also:

• KIND (O. E. ge-cynde, from the same root as is seen in " kin," supra)

kind are also frequent in See also:

• PHILLIPSITE

phillipsite (q.v.) . Crystals are usually 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 and translucent, with a vitreous lustre . The hardness is 4zf and the specific gravity 2.5 . The name harrnotome (from apµos, " a See also:

• JOINT (through Fr. from Lat. junctum, jungere, to join)

joint," and TEµvely, " to cut ") was given by R . J. flatly in 1801, and has a crystallographic signification . Earlier names are See also:

• CROSS

cross-See also:

• STONE
• STONE (0. Eng. shin; the word is common to Teutonic languages, cf. Ger. Stein, Du. steen, Dan. and Swed. sten; the root is also seen in Gr. aria, pebble)
• STONE, CHARLES POMEROY (1824-1887)
• STONE, EDWARD JAMES (1831-1897)
• STONE, FRANK (1800-1859)
• STONE, GEORGE (1708—1764)
• STONE, LUCY [BLACKWELL] (1818-1893)
• STONE, MARCUS (184o— )
• STONE, NICHOLAS (1586-1647)

stone (Ger . Kreuzstein), ercinite, andreasbergolite and andreolite, the two last being derived from the locality, Andreasberg in the Harz .

Morvenite (from Morven in See also:

• ARGYLLSHIRE

Argyllshire) is the name given to small transparent crystals formerly referred to phillipsite . Like other See also:

• ZEOLITES

zeolites, harmotome occurs with See also:

• CALCITE

calcite in the amygdaloidal cavities of volcanic rocks, for example, in the dolerites of See also:

• DUMBARTONSHIRE

Dumbartonshire, and as See also:

• FINE

fine crystals in the See also:

• AGATE

agate-lined cavities in the melaphyre of See also:

• OBERSTEIN

Oberstein in See also:

• GERMANY
• GERMANY (Ger. Deutschland)

Germany . It also occurs in See also:

• GNEISS

gneiss, and sometimes in metalliferous See also:

• VEINS

veins . At Andreasberg in the Harz it is found in the See also:

• LEAD
• LEAD (pronounced iced)

lead and See also:

• SILVER

silver veins; and at Strontian in Argyllshire in lead veins, associated with brewsterite (a See also:

• STRONTIUM [Symbol Sr, atomic weight 87.62 (0=16)]

strontium and barium zeolite), See also:

• BARYTES

barytes and calcite . (L . J .