Danburite
| ID | 22 | |
|---|---|---|
| Mineral | Danburite | |
| Location | Charcas - San Luis Potosi - Mexico | |
| Fluorescence | LW-UV: check SW-UV: check |
|
| Mindat.org |
View Danburite information at mindat.org |
|
Mindat data
| ID | 1218 |
|---|---|
| Long ID | 1:1:1218:4 |
| Formula |
CaB2Si2O8
|
| IMA Status |
0 1 |
| General Appearance | Scattered crystals in feldspar, up to 2.5 cm in size. |
| Other Occurrences | Granite and metamorphosed carbonates, evaporites. |
| Discovery Year | 1839 |
| Diapheny | Transparent,Translucent |
| Cleavage | Indistinct on {001} |
| Tenacity | brittle |
| Colour | Pale yellow, yellowish-brown, colourless |
| Hardness (min) | 7.0 |
| Hardness (max) | 7.5 |
| Lustre | Vitreous, Greasy |
| About the name | For the type locality at Danbury, Connecticut, USA. |
| Streak | White |
| Crystal System | Orthorhombic |
| Cleavage Type | Poor/Indistinct |
| Fracture type | Irregular/Uneven,Sub-Conchoidal |
| Morphology | Prismatic crystals, disseminated masses. |
| Thermal Behaviour | Heated alone, before the blowpipe, it phosphoresces and fuses slowly, without swelling, into a white blebby, transparent glass (fusability scale 3.5), coloring the flame green due to boron. On cooling the glass becomes milky-white. With borax, it melts with effervescence into a transparent globule. In a closed tube, it gives off some moisture, and phosphoresces brilliantly with a reddish yellow light. |
| Publication Year | 1839 |
| key_elements |
0 |
| shortcode_ima | Dbu |
Details
Price: € 15
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| B | Boron | |
| Ca | Calcium | |
| O | Oxygen | |
| Si | Silicium |