Hollandite (Manganese Ore), Jeff Davis County, Texas
Hollandite (a Manganese Ore)
Location: the Walter Mayfield prospect is located about 4.5 miles southwest of Chispa on the Southern Pacific Railroad.
County: Jeff Davis County
Chemical Composition: Ba(Mn+4, Mn+3)8O16
Crystal system: Monoclinic, this is an example of the botyroidal mineral habit
Specimen size: 3 x 2 x 2.5 inches
Specimen weight: 385 grams
Collection reference: TMM 198
In the Jackson School of Geosciences Collection at the University of Texas at Austin.
Additional Information: This specimen was listed as being personally collected by Virgil Barnes. Hollandite was found in botyroidal masses containing about 15% barium, that were interpreted to occupy fractures in the Mayfield fault zone.