Copper Carbonate Basic
Formula: CuCO3.Cu(OH)2
| DENS - Density (Specific Gravity) |
3.90 |
| MLPT - Melting Point (MP) |
500C D |
This form of copper carbonate is the article of commerce, this is what you are getting when you buy copper carbonate. It is a mixture of theoretical copper carbonate and copper hydroxide. The chemical structure sees two Cu atoms bonding to an OH each and sharing a CO3. Thus there are no variations in the carbonate/hydroxide mix since this refers to the structure of the molecule.
Copper Carbonate has a fairly complex decomposition. The accompanying curve shows the history of weight loss as this material is fired (courtesty of Bob Hickerson, World Metal, LLC). It is interesting to compare this chart with the one for Copper Hydroxide to see the difference in the amount of weight lost, and when and how fast it occurs.
As with other metallic coloring carbonates, copper carbonate is bulkier than the oxide form, thus it tends to disperse better to give more even results. It is also more reactive chemically that the oxide form and thus melts better. As such, it is ideal for use in brush work where minimal speck is required. However it produces gases as it decomposes and these can cause pinholes or blisters in glazes. Also the carbonate form contains less copper per gram, therefore colors are less intense than the oxide form.
The hydroxyl component is an important aid in dispersing the powder throughout the glaze slurry and thus avoid specks in the fired glaze.
Supplies of green copper carbonate basic often vary in color and density (darker and heavier, lighter and fluffier) reflecting variations in raw materials and manufacturing procedures. Despite variations in the physical appearance of the material, the amount of contained copper metal remains essentially constant.
Out Bound Links
- (Materials - Related)
Copper Hydroxide - Cu(OH)2
Copper(II) hydroxide, Copper Hydrate, Cupric Hydroxide
- (Hazards)
Copper Oxide and Carbonate
The hazards of using copper oxide and carbonate in... - (Hazards - General)
Copper Compounds Toxicology
The hazards of using these materials in the cerami... - (Temperatures)
Copper carbonate basic decomposes (300C-330C)
Loses 28% weight as it decomposes to to the heat s... - (Temperatures)
Copper carbonate basic breakdown (1050C-?)
7% weight loss involving partial loss of oxygen to... - (Typecodes)
1: GNM - Generic Material
- (Minerals - Mineral equivalent)
Azurite
Copper carbonate mineral - (Typecodes)
1: CLT - Colorant
- (MDT - Member)
Glass Industry
The materials included in this MDT were selected i... - (MDT - Member)
Enamel Industry
We are working on this database and would apprecia... - (MDT - Member)
Crystal Glazes
These materials are specially defined for makers o... - (Materials - Related)
Copper Oxide Black - CuO
Copper (II) Oxide, Black Copper, BCO, Cupric Oxide
- (Materials - Related)
Copper Oxide Red - Cu2O
Cu2O, Red Copper, RCO, Copper (I) Oxide, Cuprous Oxide
- (MDT - Member)
Australia
We are working on this database and would apprecia... - (MDT - Member)
New Zealand
We are working on this database and would apprecia... - (Troubles - Unspecified)
Glaze Pinholing, Pitting
Analyzing the causes of ceramic glaze pinholing an...
In Bound Links
Pictures
TGA-DTA Sample curve for Copper Carbonate
Malachite diagram
XML for Import into INSIGHT
<?xml version="1.0" encoding="UTF-8"?>
<material name="Copper Carbonate Basic" descrip="" searchkey="Cupric Carbonate, Copper (II) Carbonate, Azurite" loi="0.00" casnumber="3444-14-2">
<oxides>
<oxide symbol="CuO" name="Cupric Oxide" status="" percent="71.940" tolerance=""/>
</oxides>
<volatiles>
<volatile symbol="CO2" name="Carbon Dioxide" percent="28.060" tolerance=""/>
</volatiles>
</material> | 
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