CERUSSITE  , a See also:

• MINERAL

mineral consisting of See also:

• LEAD
• LEAD (pronounced iced)

lead carbonate (PbCO3), and an important ore of lead . The name (sometimes erroneously spelt cerusite) is from the See also:

• LAT

Lat. cerussa, " 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 lead." " Cerussa nativa " was mentioned by K . See also:

• GESNER
• GESNER, ABRAHAM (1797-1864)
• GESNER, JOHANN MATTHIAS (1691—1761)

Gesner in 1565, and in 1832 F . S . See also:

• BEUDANT, FRANCOIS SULPICE (1787—1850)

Beudant applied the name ceruue to the mineral, whilst the See also:

• PRESENT

present See also:

• FORM (Lat. forma)

form, cerussite, is due to W . See also:

• HAIDINGER, WILHELM KARL, RITTER VON (1795-1871)

Haidinger (1845) . Popular names in See also:

• EARLY
• EARLY, JUBAL ANDERSON (1816-1894)

early use were lead-spar and white-lead-ore . Cerussite crystallizes in the orthorhombic See also:

• SYSTEM

system and is isomorphous with See also:

• ARAGONITE

aragonite . Like aragonite it is very frequently twinned, the See also:

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

compound crystals being pseudo-hexagonal in form . Three crystals are usually twinned together on two faces of the See also:

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

prism m { 11o1, producing six-rayed stellate See also:

• GROUPS
• GROUPS, THEORY

groups (See also:

• FIGS

figs . , and 2) with the individual crystals intercrossing at angles of nearly 6o° . Twinning on the faces of the prism r { 1301, ; the angles of which are also nearly 6o°, produces a similar See also:

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

kind of grouping, but is much less See also:

• COMMON

common .

Crystals are of frequent occurrence, and they usually have very See also:

• BRIGHT, JOHN (1811-188g)
• BRIGHT, SIR CHARLES TILSTON

bright and smooth faces . The mineral also occurs in compact granular masses, and sometimes in fibrous forms . It is usually colourless or white, sometimes 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 or greenish in tint; it varies from transparent to translucent, and has an adamantine lustre . It is very brittle, and has a conchoidal fracture . Hardness 3-32; sp. gr . 6.5 . A variety containing 7% of See also:

• ZINC

zinc carbonate, replacing lead carbonate, is known as iglesiasite, from See also:

• IGLESIAS

Iglesias in See also:

• SARDINIA (Gr. 'IXs'o"uva, from a fancied resemblance to a footprint in its shape, Ital. Sardegna)

Sardinia, where it is found . The mineral may be readily recognized by its characteristic twinning, in See also:

• CONJUNCTION (from Lat. conjungere, to join together)

conjunction with the adamantine lustre and high specific gravity . It dissolves with effervescence in dilute nitric See also:

• ACID (from the Lat. root ac-, sharp; acere, to be sour)

acid . Before the See also:

• BLOW, JOHN (1648-1708)

blow- See also:

• PIPE

pipe it fuses very readily, and gives reactions for lead . Cerussite occurs in metalliferous See also:

• VEINS

veins in association with See also:

• GALENA

galena, and has been formed by the See also:

• ACTION

action of carbonated See also:

• WATERS, TERRITORIAL

waters on the galena: it is therefore found in the upper parts of the lodes FIG . 2 .

together with other secondary minerals, such as See also:

• LIMONITE, or BROWN IRON ORE

limonite . Finely crystallized specimens have been obtained from the Friedrichssegen mine near See also:

• EMS

Ems in See also:

• NASSAU

Nassau, Johanngeorgenstadt in See also:

• SAXONY
• SAXONY (Ger. Provinz Sachsen)

Saxony, Mies in Bohemia, Phenixville in See also:

• PENNSYLVANIA
• PENNSYLVANIA, UNIVERSITY OF

Pennsylvania, Broken See also:

• HILL
• HILL (0. Eng. hyll; cf. Low Ger. hull, Mid. Dutch hul, allied to Lat. celsus, high, collis, hill, &c.)
• HILL, A
• HILL, AARON (1685-175o)
• HILL, AMBROSE POWELL
• HILL, DANIEL HARVEY (1821-1889)
• HILL, DAVID BENNETT (1843–1910)
• HILL, GEORGE BIRKBECK NORMAN (1835-1903)
• HILL, JAMES J
• HILL, JOHN (c. 1716-1775)
• HILL, MATTHEW DAVENPORT (1792-1872)
• HILL, OCTAVIA (1838– )
• HILL, ROWLAND (1744–1833)
• HILL, SIR ROWLAND (1795-1879)

Hill in New See also:

• SOUTH
• SOUTH, ROBERT (1634–1716)

South See also:

• WALES (Cymru, Gwalia, Cambria)

Wales; and several other localities . Delicate acicular crystals of considerable length were found See also:

• LONG, GEORGE (1800-1879)
• LONG, JOHN DAVIS (1838– )

long ago in the Pentire Glaze mine near St Minver in See also:

• CORNWALL

Cornwall . It is often found in considerable quantities, and contains as much as 771% of lead . (L . J .