Aragonite
| ID | 250 | |
|---|---|---|
| Mineral | Aragonite | |
| Location | Germany | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Aragonite information at mindat.org |
|
Mindat data
| ID | 307 |
|---|---|
| Long ID | 1:1:307:6 |
| Formula |
Ca(CO3)
|
| IMA Status |
0 1 |
| Other Occurrences | As speleothems in limestone caves; as pisolites, sinters and massive lamellar deposits at geysers and hot springs; as seafloor oolites; with siderite in iron deposits; with calcite and dolomite and other magnesium minerals in altered serpentinites, dunites and peridotites; and as a replacement mineral in various rock types and ore deposits, formed from low-temperature and pressure aqueous solutions. |
| Discovery Year | 1797 |
| Diapheny | Transparent,Translucent |
| Cleavage | On {010} distinct; On {110} and {011} very indistinct. |
| Tenacity | brittle |
| Colour | Colorless to white or grey, often stained various hues by impurities, such as blue, green, red or violet; colourless in transmitted light. |
| Hardness (min) | 3.5 |
| Hardness (max) | 4.0 |
| Luminescence | Fluoresces pale rose, yellow, bluish, often with greenish phosphorescence, under LW, yellowish in SW. |
| Lustre | Vitreous to resinous. |
| About the name | Named in 1797 by Abrahan Gottlob Werner for the type locality, the village of Molina de Aragón, Spain, and not the province of Aragón, a mistake made by several later writers. |
| Streak | Uncolored/white. |
| Crystal System | Orthorhombic |
| Cleavage Type | Distinct/Good |
| Fracture type | Sub-Conchoidal |
| Morphology | Short to long prismatic [100], sometimes flattened {010}; acicular, often with steep pyramidal or domed terminations; or tabular {001}; also stalactic, columnar, in stellate or radiating aggregates, and fibrous crusts of tiny acicular crystals. |
| Twinning | Single crystals are typically twinned cyclically on {110} producing pseudo-hexagonal aggregates of contact and penetration twins. Polysynthetic twinning produces lamellae or fine striations parallel to [100]. |
| UV | Pale rose, yellow, white or bluish, with greenish or white phosphorescence (LW UV); yellowish (SW UV). |
| Thermal Behaviour | Begins to convert to calcite at about 400°C when heated in dry air. Thermoluminescent. |
| shortcode_ima | Arg |
| Group | Aragonite Group |
Details
Price: € 20
Dimensions: Not registered
Weight: 396 g
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| C | Carbon | |
| Ca | Calcium | |
| O | Oxygen |