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Eleonorite Strengite & Kidwellite

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BCK820915

Eleonorite Strengite & Kidwellite

Dan Behnke collection
Rare Mineral

Description Tabs

Description
Locality: 
Three Oak Gap, Polk County, Arkansas, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 1.3 × 0.7 cm
Description

ILLUSTRATED!! You are bidding on a small sample with beautiful bladed crystals of eleonorite with purple radial clusters of strengite and green botryoidal kidwellite. The sample is illustrated in Encyclopedia of Minerals 2nd edition, 1990 (beraunite) and in Photo Atlas of Minerals 2007. Comes with 5 original slides taken by Dan and his collection index card. 

This sample is from the collection of Dan Behnke, long-time friend, micromounter and prodigious photographer. I am pleased to be able to offer selections from his large collection, many of which are illustrated specimens in Rocks & Minerals, The Mineralogiocal Record, Photo Atlas of Minerals and many other publications. All samples from his meticulously catalogued collection will come with his original index card with all notes, photography annotations and other pertinent information, as well as any slides Dan may have taken of the sample with publication notes and date the photo was made.

Mineral Data
What's on the rock

Eleonorite

Formula: 
Fe3+6(PO4)4O(OH)4 · 6H2O
Group Parent: 
Beraunite Group
Crystal System: 
Monoclinic
Hardness: 
3½ - 4
Colour: 
red, reddish brown
Type Locality: 
Eleonore Mine, Rodheim-Bieber, Wetzlar, Hesse, Germany & Rotläufchen Mine, Waldgirmes, Wetzlar, Hesse, Germany

Strengite

Formula: 
FePO4·2H2O
Strunz: 
8.CD.10
Hardness: 
3.5 - 4.0
Streak: 
white
Type Locality: 
Eleonore Mine, Rodheim-Bieber, Wetzlar, Hesse, Germany

Kidwellite

Formula: 
NaFe3+9(PO4)6(OH)11·3H2O
Strunz: 
8.DK.20
Hardness: 
3.0
Streak: 
yellow
Type Locality: 
Fodderstack Mountain, Norman, Montgomery Co., Arkansas, USA

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