Alleghanyite
| ID | 469 | |
|---|---|---|
| Mineral | Alleghanyite | |
| Location | Långban Mine - Långban - Värmland - Sweden | |
| Fluorescence | LW-UV: close SW-UV: close |
|
| Mindat.org |
View Alleghanyite information at mindat.org |
|
Mindat data
| ID | 129 |
|---|---|
| Long ID | 1:1:129:0 |
| Formula |
Mn2+5(SiO4)2(OH)2
|
| IMA Status |
0 1 |
| Occurrence | Hydrothermally deposited, in lenses in a manganese-bearing vein |
| Other Occurrences | in veins crosscutting franklinite ore near pegmatites in a metamorphosed stratiform Zn-Mn deposit |
| Discovery Year | 1932 |
| Diapheny | Transparent,Translucent |
| Cleavage | Good to poor |
| Tenacity | brittle |
| Colour | Pinkish to reddish brown, deep pink, grayish pink |
| Hardness (min) | 5.5 |
| Hardness (max) | 5.5 |
| About the name | Named in 1932 by Clarence S. Ross and Paul F. Kerr after the type locality occurrence in Alleghany County, North Carolina, USA. |
| Streak | Very pale pink |
| Crystal System | Monoclinic |
| Cleavage Type | Distinct/Good |
| Fracture type | Conchoidal,Sub-Conchoidal |
| Morphology | Crystals often rounded, slender; in stout plates, some longitudinally deeply striated. As fan-shaped aggregates; commonly irregular, massive. |
| Twinning |
On |
| UV | Not fluorescent in UV |
| shortcode_ima | Alh |
| Group | Manganhumite Subgroup |
Details
Price: € 5
Dimensions: Not registered
Weight: Not registered
Visibile in overview:
Notes:
None
| Symbol | Element | |
|---|---|---|
| H | Hydrogen | |
| Mn | Manganese | |
| O | Oxygen | |
| Si | Silicium |