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Montgomeryite & Whitlockite

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BCK808190

Montgomeryite & Whitlockite

Dan Behnke collection
Classic Locality

Description Tabs

Description
Locality: 
Tip Top Mine, Fourmile, Custer County, South Dakota, United States of America
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 0.9 × 0.5 cm
Description

ILLUSTRATED! You are bidding on a heavily illustrated sample with bright red montgomeryite crystals on whitlockite matrix from the Tip Top mine. Obtained from Thomas Campbell by Dan in 1985. Illustrated in Encyclopedia of Minerals (1980, plate #30), Mineralogical Record 7/86 p245 and Rocks & Minerals 5/2000 article on montgomeryite. Comes with 9 original slides scanned and shown here. l

Mineral Data
What's on the rock

Montgomeryite

Formula: 
Ca4MgAl4(PO4)6(OH)4·12H2O
Strunz: 
8.DH.25
Hardness: 
4.0
Type Locality: 
Clay Canyon, Fairfield, Oquirrh Mts, Utah Co., Utah, USA

Whitlockite

Formula: 
Ca9Mg(PO4)6(HPO4)
Group Parent: 
Whitlockite Group
Strunz: 
8.AC.45
Crystal System: 
Trigonal
Hardness: 
5.0 -
Colour: 
Colourless, grey-white, light pink, light yellow; colourless in transmitted light
Type Locality: 
Palermo No. 1 Mine Grafton County, New Hampshire, USA

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