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Eakerite & Brannockite

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BCK805776

Eakerite & Brannockite

Dan Behnke collection
Type Locality

Description Tabs

Description
Locality: 
Foote Mine, Cleveland County, North Carolina, United States of America
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.2 × 2.5 × 1.6 cm
Description

You are bidding on a thumbnail sample with both crystals of brannockite and eakerite on matrix from the type locality. Specimens with both the species together at the Foote Mine are extremely rare and very few are known to exist. I only have two similar samples in my extensive collection from this mine. Dan purchased this sample from me in 2001 at the Rochester Symposium. The sample has dozens of basally twinned brannockite crystals on matrix with a thin film of bavenite/swinefordite mixture covering them,d with a few prisms of eakerite growing on top. Comes with Dan's orginal slide (scanned here) and 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

Eakerite

Formula: 
Ca2SnAl2Si6O18(OH)2·2H2O
Strunz: 
9.CG.05
Crystal System: 
Monoclinic
Hardness: 
5.5
Type Locality: 
Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA

Brannockite

Formula: 
(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]
Strunz: 
9.CM.05
Hardness: 
5.0 - 6.0
Type Locality: 
Foote Lithium Co. Mine (Foote Mine), Kings Mountain District, Cleveland Co., North Carolina, USA

Seller Information

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