Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Pentlandite from
Unnamed Occurrence (ARDF - MF018; west of Mt. Fairweather), Yakutat Mining District, Yakutat, Alaska, USA


Classification
Species:Pentlandite
Formula:(NixFey)Σ9S8
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Pentlandite data
Locality Data:Click here to view Unnamed Occurrence (ARDF - MF018; west of Mt. Fairweather), Yakutat Mining District, Yakutat, Alaska, USA
Data Identifiers
Mindat Occurrence Record ID:592467
Long-form Identifier:1:3:592467:7
GUID (UUID V4):0
Nearest other occurrences of Pentlandite
2.2km (1.4 miles) ⓘUnnamed Occurrence (ARDF - MF017; between Fairweather and Sea Otter Glaciers), Yakutat Mining District, Yakutat, Alaska, USA
8.6km (5.4 miles) ⓘUnnamed Occurrence (ARDF - MF016; moraine on Fairweather Glacier), Yakutat Mining District, Hoonah-Angoon Census Area, Alaska, USA
34.5km (21.4 miles) ⓘUnnamed Occurrence (ARDF - MF005; north wall of South Crillon Glacier), Yakutat Mining District, Hoonah-Angoon Census Area, Alaska, USA
55.9km (34.8 miles) ⓘBrady Glacier nickel-copper deposit Prospect, Glacier Bay Mining District, Alaska, USA
References
(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey
 
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