Annabergite
| ID | 127 | |
|---|---|---|
| Mineral | Annabergite | |
| Location | Carnaiba - Bahia - Brazil | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Annabergite information at mindat.org |
|
Mindat data
| ID | 240 |
|---|---|
| Long ID | 1:1:240:2 |
| Formula |
Ni3(AsO4)2 · 8H2O
|
| IMA Status |
0 1 |
| General Appearance | Green bladed crystals and green coatings |
| Occurrence | Oxide zone in a nickel-bearing sulfide deposit |
| Other Occurrences | An uncommon oxidation zone mineral in Ni-Co-As deposits, frequently post-mine on ores exposed to the atmosphere. |
| Discovery Year | 1852 |
| Diapheny | Transparent,Translucent |
| Cleavage |
Perfect on {010}, indistinct on {100}, |
| Tenacity | sectile |
| Colour | Green, light grey to light apple green, white; pale rose red when rich in cobalt. |
| Hardness (min) | 1.5 |
| Hardness (max) | 2.5 |
| Luminescence | None? |
| Lustre | Weakly adamantine, vitreous, earthy when powdery. |
| About the name | Named by Henry J. Brooke and William Hallowes Miller in 1852 after one of the co-type localities, Annaberg, Saxony, Germany. |
| Streak | Pale green to white (paler than the mineral color). |
| Crystal System | Monoclinic |
| Cleavage Type | Perfect |
| Morphology |
Crystals usually rare and of poor quality, prismatic to acicular [001] and flattened {010}. Crystals are deeply striated or furrowed [001], also striated on {010} parallel to {h)l} or |
| UV | Not fluorescent. |
| Comment Luster | Pearly on {010} cleavage, dull when massive. |
| key_elements |
0 1 |
| shortcode_ima | Anb |
| Group | Vivianite Group |
Details
Price: € 5
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
| Symbol | Element | |
|---|---|---|
| As | Arsenic |
|
| H | Hydrogen | |
| Ni | Nickel |
|
| O | Oxygen |