【化】 钴华; 八水合砷酸钴

[ noun ]
a reddish mineral consisting of hydrated cobalt arsenate in monoclinic crystalline form and used in coloring glass; usually found in veins bearing cobalt and arsenic
<noun.substance>

Cobalt \Co"balt\ (k[=o]"b[o^]lt; 277, 74), n. [G. kobalt, prob.
fr. kobold, kobel, goblin, MHG. kobolt; perh. akin to G.
koben pigsty, hut, AS. cofa room, cofgodas household gods,
Icel. kofi hut. If so, the ending -old stands for older
-walt, -wald, being the same as -ald in E. herald and the
word would mean ruler or governor in a house, house spirit,
the metal being so called by miners, because it was poisonous
and troublesome. Cf. {Kobold}, {Cove}, {Goblin}.]
1. (Chem.) A tough, lustrous, reddish white metal of the iron
group, not easily fusible, and somewhat magnetic. Atomic
weight 59.1. Symbol Co.

Note: It occurs in nature in combination with arsenic,
sulphur, and oxygen, and is obtained from its ores,
smaltite, cobaltite, asbolite, etc. Its oxide colors
glass or any flux, as borax, a fine blue, and is used
in the manufacture of smalt. It is frequently
associated with nickel, and both are characteristic
ingredients of meteoric iron.

2. A commercial name of a crude arsenic used as fly poison.

{Cobalt bloom}. Same as {Erythrite}.

{Cobalt blue}, a dark blue pigment consisting of some salt of
cobalt, as the phosphate, ignited with alumina; -- called
also {cobalt ultramarine}, and {Thenard's blue}.

{Cobalt crust}, earthy arseniate of cobalt.

{Cobalt glance}. (Min.) See {Cobaltite}.

{Cobalt green}, a pigment consisting essentially of the
oxides of cobalt and zinc; -- called also {Rinman's
green}.

{Cobalt yellow} (Chem.), a yellow crystalline powder,
regarded as a double nitrite of cobalt and potassium.

Erythrite \E*ryth"rite\, n. [Gr. 'eryqro`s red.]
1. (Chem.) A colorless crystalline substance, {C4H6.(OH)4},
of a sweet, cooling taste, extracted from certain lichens,
and obtained by the decomposition of erythrin; -- called
also {erythrol}, {erythroglucin}, {erythromannite},
{pseudorcin}, {cobalt bloom}, and under the name {phycite}
obtained from the alga {Protococcus vulgaris}. It is a
tetrabasic alcohol, corresponding to glycol and glycerin.

2. (Min.) A rose-red mineral, crystallized and earthy, a
hydrous arseniate of cobalt, known also as {cobalt bloom};
-- called also {erythrin} or {erythrine}.


Erythrite \E*ryth"rite\, n. [Gr. 'eryqro`s red.]
1. (Chem.) A colorless crystalline substance, {C4H6.(OH)4},
of a sweet, cooling taste, extracted from certain lichens,
and obtained by the decomposition of erythrin; -- called
also {erythrol}, {erythroglucin}, {erythromannite},
{pseudorcin}, {cobalt bloom}, and under the name {phycite}
obtained from the alga {Protococcus vulgaris}. It is a
tetrabasic alcohol, corresponding to glycol and glycerin.

2. (Min.) A rose-red mineral, crystallized and earthy, a
hydrous arseniate of cobalt, known also as {cobalt bloom};
-- called also {erythrin} or {erythrine}.