Cobalt-bearing Calcite and Malachite
| ID | 444 | |
|---|---|---|
| Mineral |
Cobalt-bearing Calcite
Malachite |
|
| Location | Bou Azzer - Bou Azzer - Morocco | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Cobalt-bearing Calcite information at mindat.org View Malachite information at mindat.org |
|
Mindat data
| ID | 1094 |
|---|---|
| Long ID | 1:1:1094:4 |
| IMA Status |
0 1 |
| Variety of | 859 |
| Entry type | 2 |
| Description | A more or less pink variety of calcite containing Co2+ replacing Ca. Dark pink varieties are easily confused with spherocobaltite (CoCO3), the cobalt endmember of the calcite group. Crusts and globular aggregates may be confused with cobalt-bearing ... |
| Hardness (min) | 3.0 |
| Hardness (max) | 3.0 |
| Lustre | Vitreous |
| Crystal System | Trigonal |
| ID | 2550 |
|---|---|
| Long ID | 1:1:2550:4 |
| Formula |
Cu2(CO3)(OH)2
|
| IMA Status |
0 1 |
| Other Occurrences | It is the most common secondary mineral found in the oxidized zones of copper deposits. |
| Industrial | A minor ore of copper when abundant enough in a copper deposit. |
| Discovery Year | Unno |
| Diapheny | Opaque |
| Cleavage |
Perfect on |
| Tenacity | brittle |
| Colour | Bright green, with crystals deeper shades of green, even very dark to nearly black; green to yellowish green in transmitted light. |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| About the name | Named in antiquity (see Pliny the Elder, 79 CE) molochitus after the Greek μαλαχή, "mallows," in allusion to the green color of the leaves. Known in the new spelling, malachites, at least by 1661. |
| Streak | Light green |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Splintery |
| Morphology | Crystals uncommon, usually short or long prismatic or acicular, parallel to [001]; often grouped in rosettes, sprays, or tufts. Botryoidal to mammillary aggregates of radiating fibrous crystals more common. It may also be massive, compact, and stalactitic. |
| Twinning | Untwinned crystals are extremely rare. Typically twinned on {100}, sometimes as penetration or polysynthetic twinning with the axis parallel to [201]. |
| Thermal Behaviour | Loses water at about 315°, leaving tenorite. |
| key_elements |
0 |
| shortcode_ima | Mlc |
| Group | Rosasite Group |
Details
Price: € 25
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| C | Carbon | |
| Ca | Calcium | |
| Co | Cobalt |
|
| Cu | Copper | |
| H | Hydrogen | |
| O | Oxygen |