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Chernikovite & Meta-ankoleite

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SYA580555

Chernikovite & Meta-ankoleite

ex Ernst J. Fröbe (1851 - 1921) collection
Radioactive

Description Tabs

Description
Locality: 
Rockelmann Quarry, Schwarzenberg, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.5 × 2.5 cm
Description

Very good crystals of yellow chernikovite intergrown with yellow-green meta-autunite and minor green-yellow meta-ankoleit on quartz crystals.

Analyzed.

Specimen from the historic collection of the mining director Ernst Julius Fröbe ( 1851 - 1921) from Schwarzenberg, Saxony.

The material was collected by E. Fröbe and K. Schiffner 1905 - 1910

The Rockelmann quarry was defunct in1930.

Karl Schiffner published this finds in 1911 and they were stored with the name "Kalkuranglimmer" in the collection of E. Fröbe

This part of the collection was discoverd in 2014 and the whole material was newly investigated and analyzed.

These are the best and richest specimens known for this rare mineral.

Please take note of the article about the discovery of the Fröbe collection in  LAPIS  11 / 2016.

 

 

Mineral Data
What's on the rock

Chernikovite

Formula: 
(H3O)2(UO2)2(PO4)2·6H2O
Strunz: 
8.EB.15
Hardness: 
2.0 - 2.5
Type Locality: 
Karakat U Deposit, Karamazar Mts, Adrasman, Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad), Tajikistan

Meta-ankoleite

Formula: 
K2(UO2)2(PO4)2·6H2O
Strunz: 
8.EB.15
Hardness: 
2.0 - 3.0
Colour: 
yellow
Type Locality: 
Mungenyi pegmatite, Ankole pegmatite field, Mbarara District, Uganda

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