Riebeckite
| ID | 94 | |
|---|---|---|
| Mineral | Riebeckite | |
| Location | Kuruman - Kalahari Mangaan Fields - South Africa | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Riebeckite information at mindat.org |
|
Mindat data
| ID | 3418 |
|---|---|
| Long ID | 1:1:3418:6 |
| Formula |
◻Na2(Fe2+3Fe3+2)Si8O22(OH)2
|
| IMA Status |
0 1 |
| Other Occurrences | Alcalic granites, syenite and undersaturated rocks. Rarer in felsic volcanics and granite pegmatites; also in some schists. In iron formations as asbestiform "crocidolite". |
| Discovery Year | 1888 |
| Diapheny | Translucent,Opaque |
| Cleavage | Perfect on {110} |
| Tenacity | brittle |
| Colour | Usually black, also commonly light blue to blue-black, gray-blue, gray, brown |
| Hardness (min) | 5.0 |
| Hardness (max) | 5.5 |
| Luminescence | Nonfluorescent |
| Lustre | Vitreous |
| About the name | For Emil Riebeck (June 11, 1853 Preuslitz, Germany - June 22, 1885 Feldkirch, Vorarlberg, Austria), German explorer, ethnologist, and mineralogist. Noted author and field collector of artifacts. |
| Streak | Pale gray to bluish-grey. |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Fracture type | Splintery |
| Morphology | Prismatic {110}, frequently very elongated. May be acicular, especially in late cavities. Sometimes is very acicular in fine-grained, light colored aggregates. Well-terminated crystals are uncommon. |
| UV | Not fluorescent |
| shortcode_ima | Rbk |
| Group | Riebeckite Root Name Group |
Details
Price: € 10
Dimensions: Not registered
Weight: 34 g
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| Fe | Iron | |
| H | Hydrogen | |
| Na | Sodium | |
| O | Oxygen | |
| Si | Silicium |