Museum Collection
This specimen is part of the museum collection catalog.
Not for Sale.
Columbite-(Mn) Tantalite-(Mg)
Dunton Mine, Maine, USA
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| Classification |
Mineral |
| Tags |
Perky Box
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| Origin Location |
Dunton Mine, Maine, USA |
| Description |
A perfect, euhedral micromount crystal of this commercially important ore of Niobium and Tantalum, known by the trade name Coltan. This mineral is an important component in modern technology componentry, and it's consequently associated with "conflict minerals" due to it's criticality to industry, resulting in significant global regulation of this material. This specimen is from a US source. |
| Luster |
Vitreous |
| Luster (Groundmass) |
Not noted, see photo. |
| Optical Phenomena |
Not noted, see photo. |
| Mineral Group / Note |
Not noted, check reference links below. |
| Handling |
No special handling is required. |
| Modifications |
No modifications. |
| Size Group |
Micromount |
| Weight |
Not weighed precisely yet, please inquire. |
| Dimensions |
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| Quantity |
1 Specimen |
| Mineral List |
Columbite-(Mn): Mn2+Nb2O6
manganese niobium hexoxide *
Tantalite-(Mg): MgTa2O6
magnesium tantalum hexoxide *
* Formula chemical names are auto-generated - may be incorrect on complex formulas.
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Specimen Analysis |
Color Table
Colors found in this specimen image are shown below. Higher number indicates greater concentration of that color.
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Similarly Colored Minerals:
Minerals with similar color profiles are shown below.
How it Works
Senarmontite Phenakite Thomsonite Clinohumite Beryl var. Aquamarine/Heliodor Ulexite |
Elements in this Specimen:
Elements that are part of the official chemical structure of the minerals occurring in this specimen are indicated below.
How it Works
Element List:
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Minerals with Similar Chemistry:
Minerals that are similar in terms of their chemical makeup are shown below.
How it Works
This Mineral Formula Similar Mineral Formula
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Mineral Group:
Search the catalog for minerals that share the same group as this specimen:
How it Works
Structural Group(s):
Fleischers Group(s):
columbite-euxenite-columbite subgroup
columbite-euxenite-columbite subgroup
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| Tools |
Edit Specimen
Search Wikipedia: Columbite-(Mn) Tantalite-(Mg) (Wiki)
Search Mindat: Columbite-(Mn) Tantalite-(Mg)
Search Web Mineral DB: Columbite-(Mn) Tantalite-(Mg)
Search for Handbook of Mineralogy: Columbite-(Mn) Tantalite-(Mg)
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