How do I identify Bonaccordite?

Bonaccordite can be identified by its hardness of 7 on the Mohs scale, Reddish-brown color. Look for these key characteristics when examining specimens.

What color is Bonaccordite?

Bonaccordite typically appears in Reddish-brown, light grey. Color can vary depending on impurities and formation conditions.

How hard is Bonaccordite?

Bonaccordite has a hardness of 7 on the Mohs scale. This makes it a relatively hard mineral suitable for jewelry.

Bonaccordite

A variety of Minerals

What is 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.

Bonaccordite Market Value Calculator

Estimate the market value of Bonaccordite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.

Bonaccordite Localities Map

See where Bonaccordite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.

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North ZoneCentral RidgeSouth Basin

Key Characteristics

Characteristics of Bonaccordite

Bonaccordite is an opaque mineral with a reddish-brown color. In reflected light, the color is grey with a brownish tinge with strong, reddish-brown internal reflections. In many cases, bonaccordite crystallizes into long, slender cylinders. It has been discovered to be the nickel analogue of ludwigite. The Mohs hardness for bonaccordite is 7 and its density is 5.17 g/cm. The optical class is biaxial. Bonaccordite has an orthorhombic crystal system with a point group of 2/m 2/m 2/m. The crystals are structured as elongated prisms within another material. There has been no observed cleavages or twinning. Space group has been determined as [Pbam] and cell dimensions were calculated to a = 9.213(6) b = 12.229(7) c = 3.001(2) Z = 4. Bonaccordite is insoluble and has only shown reactivity to hydrochloric acid. It is very hard to clean it off of fuel rods in nuclear power reactors where it is sometimes formed. 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 B(n,α)Li reaction with boron in coolant. Bonaccordite can be an indicator of Axial-Offset-Anomaly of neutron flux and power density in PWR power plants.