Bonaccordite

Bonaccordite is a rare mineral discovered in 1974. Its chemical formula is Ni2FeBO5 and it is a mineral of the ludwigite group. It usually crystallizes in long, cylindrical prisms that form within another source. It is named after the area of Bon Accord, where it was first found. There have also been findings of bonaccordite within nuclear plants at multiple companies. It builds up a deposit within the machines and is a very hard mineral to clean out because it is resistant to ordinary techniques.

History

Bonaccordite was first described in 1974 for an occurrence in the Bon Accord area, Barberton, Transvaal, South Africa. It occurs in a tabular nickeliferous serpentinite, on the margin of an ultramafic intrusive. ==Composition==

Composition

The chemical formula for bonaccordite is Ni2FeBO5. The two analysts confirmed the presence of boron by using wet-chemical analysis. ==Geologic occurrence==

Geologic occurrence

Bonaccordite can occur as either a cluster of thin, long prisms or rosette-like radiating groups. The prisms can form veins through other minerals and the radiating groups can occur in minerals like liebenbergite or trevorite. Bonaccordite usually occurs along with trevorite, liebenbergite, népouite, nimite, gaspeitev, and millerite in the area of Bon Accord. All of these minerals crystallize as slender prisms. ==Physical properties==

Physical properties

Bonaccordite is an opaque mineral with a reddish-brown color. It has been shown to form hydrothermally in near-supercritical water at temperatures above 350 °C and in presence of alkaline conditions. Its formation in PWR reactors can be accelerated by lithium produced in 10B(n,α)7Li reaction with boron in coolant. Bonaccordite can be an indicator of Axial-Offset-Anomaly of neutron flux and power density in PWR power plants. ==References==

Source: Wikipedia ↗

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