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Kidwellite on Beraunite & Strengite

#BN53076

Kidwellite on Beraunite & Strengite

#BN53076
Availability
Sold
Size
13 x 10 x 6 cm - Cabinet 
Formula
NaFe3+9(PO4)6(OH)11·3H2O (RRUFF)
Locality
Three Oaks Gap, Polk Co., Arkansas, United States
Tagged
phosphate

You get to looking at this specimen, and I think it is the best one in this Special Edition. I actually did not notice the Strengite at first. Those little purplish pink smooth balls are the Strengite. The fourth photo shows one of these balls. The Beraunite is rich and a flashy dark red, The crystals are lath-like to about 5mm. The Kidwellite is a dark green to a light greyish green. A very good specimen.

Kidwellite

Formula
NaFe3+9(PO4)6(OH)11·3H2
Crystal System
Monoclinic 
Crystal Habit
Fibrous, Columnar 
Cleavage
Perfect, None, None 
Luster
Silky 
Color
greenish yellow, greenish white, yellow, light green 
Streak
yellow 
Class
Monoclinic - Prismatic 
Hardness

Data courtesy of Webmineral.

Collection
Dr. Buford Nichols Collection

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