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Columbite With Triplite & Mica Var Muscovite & Vivianite

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LGM652529

Columbite With Triplite & Mica Var Muscovite & Vivianite

Ex Dr. Krantz, Bonn, Germany
With Antique Label

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Description Tabs

Description
Locality: 
Hagendorf North Pegmatite, Hagendorf, Waidhaus, Upper Palatinate, Bavaria, Germany
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 7.5 × 4 cm
Largest Crystal: 
0.80cm
Weight: 
355.00gr
Description

Old Hagendorf specimen featuring a black columbite crystal frozen in massive matrix consisting of fine-grained, silvery muscovite, brownish triplite and greenish vivianite.

Comes with old, faded pencil-written label. The label means:
"Niobit, Triplit, Kaliglimer, Vivianit - Spatgrube Meixner - 20 R.M. Hagendorf" (Columbite, Triplite, Muscovite, Vivianite - Meixner Spar pit - 20 R.M. [stands for Reichsmark, a currency used in Germany from 1924-1948])

Niobit = columbite, Dana 6th, 731 (1892)
Kaliglimmer = muscovite, Dana 6th, 614 (1892) (the "m" in Kaliglimer is doubled by the overbar - old german spelling)
"Spatgrube Meixner" is the old name for which is known as present-day "Hagendorf North pegmatite".

The columbite is slightly radioactive due to content of U, Th and rare earth elements (appr. 2.2 micro Sv/h within spitting distance).

 

Mineral Data
What's on the rock

Triplite

Formula: 
(Mn2+,Fe2+)2(PO4)(F,OH)
Strunz: 
8.BB.10
Hardness: 
5.0 - 5.5
Type Locality: 
Chanteloube, Razès, Haute-Vienne, Limousin, France

Mica

Group Parent: 
Mica Group

Muscovite

Formula: 
KAl2(AlSi3O10)(OH)2
Strunz: 
9.EC.15
Hardness: 
2.5
Streak: 
White

Vivianite

Formula: 
Fe2+3(PO4)2·8H2O
Strunz: 
8.CE.40
Crystal System: 
Monoclinic
Hardness: 
1.5 - 2.0
Type Locality: 
Wheal Kind (Wheal Kine), West Wheal Kitty group, St Agnes, St Agnes District, Cornwall, England, UK

Seller Information

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Seller's terms and conditions

Thank you for viewing my auctions! Maintaining high standards in customer service is extremely important to me. If shipping takes longer than expected, please contact me. It is possible to file an investigation request, and during nearly ten years of e-rocks NO parcel was finally lost.

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I will happily do all in my power to resolve the situation to your satisfaction.

+++IMPORTANT+++
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