*** Welcome to piglix ***

Blue verditer

Basic copper carbonate
Basic copper carbonate
Names
IUPAC name
Dicopper carbonate dihydroxide
Other names
copper carbonate hydroxide, cupric carbonate, copper carbonate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.031.909
PubChem CID
Properties
Cu2(OH)2CO3
Molar mass 221.114 g/mol
Appearance green powder
Density 4 g/cm3
Melting point 200 °C (392 °F; 473 K)
Boiling point 290 °C (554 °F; 563 K) decomposes
insoluble
7.08·10−9
Thermochemistry
88 J/mol·K
−595 kJ/mol
Hazards
Safety data sheet Oxford MSDS
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)
GHS signal word Warning
H302, H315, H319, H335
P261, P305+351+338
Lethal dose or concentration (LD, LC):
LD50 (median dose)
159 mg/kg (rat, oral)
US health exposure limits (NIOSH):
PEL (Permissible)
TWA 1 mg/m3 (as Cu)
REL (Recommended)
TWA 1 mg/m3 (as Cu)
IDLH (Immediate danger)
TWA 100 mg/m3 (as Cu)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
No  (what is YesYNo ?)
Infobox references

Basic copper carbonate is a chemical compound, more properly called copper(II) carbonate hydroxide. It is an ionic compound (a salt) consisting of the ions copper(II) Cu2+
, carbonate CO2−
3
, and hydroxide HO
.

The name most commonly refers to the compound with formula Cu
2
CO
3
(OH)2. It is a green crystalline solid that occurs in nature as the mineral malachite. It has been used since antiquity as a pigment, and it is still used as such in artist paints, sometimes called verditer, green bice, or mountain green.

Sometimes the name is used for Cu
3
(CO
3
)2(OH)2, a blue crystalline solid also known as the mineral azurite. It too has been used as pigment, sometimes under the name mountain blue or blue verditer.


...
Wikipedia

...