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Hydrohetaerolite
Current inventory:  0 gems
 

  
Hydrohetaerolite is named for it being a HYDROus mineral, and its relation to Hetaerolite. Hetaerolite is named from the Greek word for companion, in allusion to the association with Chalcophanite on some type locality specimens.

Discovered in 1928;   IMA status: Valid (pre-IMA; Grandfathered)

Chemistry

Chemical Formula:

Zn₂Mn³⁺₄O₈•(H₂O)

Hydrated Zinc Manganese Oxide

Molecular Weight:

496.54 gm

Composition: 

Classification

Mineral Classification:

Oxides

Strunz 8th Ed. ID:

4/B.05-50

Nickel-Strunz 10th Ed. ID:

4.BB.10

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
B : Metal: Oxygen = 3:4 and similar
B : With only medium-sized cations

Related to:

Hetaerolite

Synonyms:

Backstromite, Pseudopyrochroite, Wolftonite

Crystal Data

Crystallography:

Tetragonal - Ditetragonal Dipyramidal

Crystal Habit:

Crystals are fibrous, elongated || [110]; radiating, in botryoidal crusts, finely granular, massive.

Twinning:

None

Physical Properties

Cleavage:

Distinct/Good; Cleavable parallel to the elongation of the fibers.

Tenacity:

Brittle

Moh's Hardness:

5.0 - 6.0

Density:

4.64 (g/cm³)

Luminescence:

None

Radioactivity:

Not Radioactive

Optical Properties

Color:

Dark Brown to Brownish Black; dark Brown in transmitted light

Transparency:

Opaque, Transparent on thin edges

Luster:

Sub-Metallic

Refractive Index:

2.100 - 2.260  Uniaxial ( + )

Birefringence:

0.160

Dispersion:

None

Pleochroism:

None

Anisotrophism:

Color in reflected light: creamy Gray

Occurances

Geological Setting:

In oxidized manganese-bearing zinc deposits.

Common Associations:

Chalcophanite, Hemimorphite, Smithsonite (Leadville, Colorado, USA); Chalcophanite (Franklin, New Jersey, USA).

Co-Type Localities:

Wolftone Mine, Carbonate Hill, Leadville, Leadville District, Lake County, Colorado, USA; Passaic Pit (Marshall Mine, Passaic Mine), Sterling Hill, Ogdensburg, Franklin Mining District, Sussex County, New Jersey, USA

Year Discovered:

1928

View mineral photos:

Hydrohetaerolite Mineral Photos and Locations

More Information

Mindat.org
Webmineral.com

Hydrohetaerolite is a somewhat rare mineral that is found in oxidized manganese-bearing zinc deposits. It is often found associated with Chalcophanite. This is a mineral that is rarely faceted because it is typically dark brown, with a dull to sub-metallic luster. It is really just a curiosity for collectors of odd "gems".

Hydrohetaerolite is found in the USA, from the Wolftone mine, Leadville, Lake County, Colorado; at Sterling Hill, Ogdensburg, Sussex County, New Jersey; in the Mohawk mine, San Bernardino County, California; in Arizona, from the Campbell mine, Bisbee, and the Emerald mine, Tombstone, Cochise County. In England, from the Copperthwaite vein, Swaledale, North Yorkshire. At Silvermines, County Tipperary, Ireland. On Mont Chemin, Valais, Switzerland. In the Orzel Bialy mine, Upper Silesia, Poland. In Japan, from the Maruyama mine, Aomori Prefecture.
 

  
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