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Schlossmacherite
Current inventory:  0 gems
 

  
Schlossmacherite is named in honor of Professor Emeritus Karl Schlossmacher (1887–1980), Institute for Mineralogy and Petrography, Johannes Gutenberg University, Mainz, Germany and Honorary President of the German Gemmological Society.

Discovered in 1980;   IMA status: Valid (IMA approved)

Chemistry

Chemical Formula:

(H₃O,Ca)Al₃(SO₄,AsO₄)₂(OH)₆

Hydrated Hydrogen Calcium Aluminum Arsenate Sulfate Hydroxide

Molecular Weight:

463.69 gm

Composition: 

Classification

Mineral Classification:

Sulfates

Strunz 8th Ed. ID:

7/B.35-10

Nickel-Strunz 10th Ed. ID:

7.BC.10

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
B : Sulfates (selenates, etc.) with additional anions, without H₂O
C : With medium-sized and large cations

Related to:

Alunite Group. Beudantite Subgroup.

Crystal Data

Crystallography:

Trigonal - Hexagonal Scalenohedral

Crystal Habit:

As polycrystalline aggregates and crusts.

Twinning:

None

Physical Properties

Cleavage:

n/a

Fracture:

n/a

Tenacity:

Brittle

Moh's Hardness:

3.0 - 4.0

Density:

1.757 (g/cm³)

Luminescence:

None

Radioactivity:

Not Radioactive

Optical Properties

Color:

Gray Green, pale Green

Transparency:

Translucent to Opaque

Luster:

Vitreous to Waxy

Refractive Index:

1.597  Uniaxial ( + )

Birefringence:

0.000

Dispersion:

None

Pleochroism:

None

Occurances

Geological Setting:

A rare secondary mineral in the oxidized zone of a copper-bearing gold deposit.

Common Associations:

Alumopharmacosiderite, Barite, Ceruleite, Chenevixite, Goethite, Mansfieldite, Olivenite, Quartz

Type Locality:

Emma Luisa Mine, Guanaco (Huanaco), Santa Catalina, Antofagasta Province, Antofagasta Region, Chile

Year Discovered:

1980

View mineral photos:

Schlossmacherite Mineral Photos and Locations

More Information

Mindat.org
Webmineral.com

Schlossmacherite is a very rare secondary mineral in the oxidized zone of a copper-bearing gold deposit at the Emma Luisa gold mine, Guanaco district, about 100 km east-northeast of Taltal, Antofagasta, Chile. This is the only location in the world for Schlossmacherite. It is found as polycrystalline aggregates and crusts of pale green to grayish green.
 

  
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