Manganese violet

[3] Notable artists who have used the pigment include Claude Monet, who relied on manganese violet in his Rouen Cathedral series to further his exploration of shadows.

[4] Beyond the artistic community, manganese violet has been used in cosmetics to color products like lipstick and eyeshadow.

[2][8][9] For the synthesis from Mn(III) oxide, an idealized equation follows: The pigment has two polymorphs: α- and β-forms.

The feature octahedral Mn(III) centers, which are distorted by Jahn-Teller effect, as expected for a high spin (quintet state) d4 ions.

[3]: 178  The visual characteristics of manganese violet remain a source of contention among the artistic community.

[13] The pigments' popularity was short lived within the artistic community because of its dullness and poor hiding power.

[17] He tended to use what he regarded as pure pigments, such as cobalt blue, French ultramarine, and lead white.

[16] In Seurat's painting Channel of Gravelines, Grand Fort-Philippe, for example, manganese violet was used in the border.

[18] There is speculation that Seurat utilized manganese violet in the border because of its low tinting power.

The Waitress was created by Édouard Manet in 1879.
The Rouen, Cathedral, West Facade, Sunlight was created by Claude Monet in 1894 as another piece of the Rouen Cathedral series.
The Channel of Gravelines, Grand Fort-Philippe was created by Georges Seurat in 1890.
The Portal of Rouen Cathedral in Morning Light was created by Claude Monet in 1894 as a part of the Rouen Cathedral series.