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Čechite & Fluorite

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RSL604663

Čechite & Fluorite

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Description Tabs

Description
Locality: 
Maria Magdalena Mine, Ulldemolins, Tarragona, Catalonia, Spain
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.4 × 2 cm
Largest Crystal: 
0.15cm
Description

Very rich and sharp crystals Čechite specimen!!! These specimens belong from a find (2016) in a outcrop close to Maria Magdalena mine, near the beautiful town of Ulldemolins (Tarragona, Catalonia).
Only few samples has been collected. Probably, these crystals are the most defined crystals of Čechite worldwide. They are brilliant, black color and show a tabular shape defined by different order orthorhombic prisms and pinacoidal faces. Disposed very aerial on a fluorite matrix.

Čechite is very rare lead iron vanadate that is only found in a few places in the world and it is the first citation in the Iberian peninsula.
SEM-EDS and EPMA analysis show that, in some cases, on the crystal surface there is Cu2+ has been formed but the crystal is pure PbFe2+(VO4)(OH). In most specimens (all) from other localities the presence of manganese is important, but these specimens are Mn free. We will send more details to the buyer.

Mineral Data
What's on the rock

Čechite

Formula: 
Pb(Fe2+,Mn2+)(VO4)(OH)
Strunz: 
8.BH.40
Hardness: 
4.5 - 5.0
Colour: 
Black
Streak: 
Black
Type Locality: 
Alexander Shaft (Alexander Mine), Vrančice, Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Fluorite

Formula: 
CaF2
Strunz: 
3.AB.25
Crystal System: 
Isometric
Hardness: 
4.0
Streak: 
White
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
Analysis
Analysis Report - only: Čechite & Fluorite