[5] In basic solution, single-crystalline Pb2CrO5 could be formed by heating lead acetate and potassium dichromate with microwave radiation for only 10 minutes at 90 Celsius.

[5] The bundle and rod-shaped structures are sensitive to electron beam irradiation, which will turn them into many small particles.

[7] In a catalog published c. 1835, Winsor and Newton paint company identify ten synthetic pathways for producing chrome orange, also called deep yellow.

[8] Controlling the pH was Winsor and Newton's method for creating pigments from the pale yellow to the deep chrome orange.

[8] The natural mineral crocoite was discovered in 1797 by Louis Vauquelin and chrome orange was synthesized as a pigment for the first time in 1809.

The yellow-orange pigment of the boat in Renoir’s 1879 painting, The Seine at Asnières (The Skiff) at the National Gallery, London.