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Barium chromate, is a yellow sand like powder with the formula BaCrO 4. It is a known oxidizing agent and produces a green flame when heated, a result of the barium ions. It is a known oxidizing agent and produces a green flame when heated, a result of the barium ions.
Hashemite is a very rare barium chromate mineral [1] with the formula Ba(Cr,S)O4. [2] It is a representative of natural chromates - a relatively small and rare group of minerals. Hashemite is the barium-analogue of tarapacáite. It is also the chromium-analogue of baryte, and belongs to the baryte group of minerals.
Manganese Delay Composition: manganese with lead chromate and barium chromate (lead chromate is the principal oxidizer, barium chromate acts as burning rate modifier, the more of it the slower the reaction) [1] Tungsten Delay Composition: tungsten with barium chromate and potassium perchlorate [2]
Barium chromate – BaCrO 4 [88] Barium ferrate – BaFeO 4; Barium ferrite – BaFe 12 O 19 [89] Barium fluoride – BaF 2 [90] Barium hydroxide – Ba(OH) 2 [91] [92]
The hydrogen chromate ion may be protonated, with the formation of molecular chromic acid, H 2 CrO 4, but the pK a for the equilibrium H 2 CrO 4 ⇌ HCrO − 4 + H + is not well characterized. Reported values vary between about −0.8 and 1.6. [4] The dichromate ion is a somewhat weaker base than the chromate ion: [5]
Another composition in use is zirconium with barium chromate. [2] Another mixture is 46.67 wt.% of titanium, 23.33% of amorphous boron, and about 30% barium chromate. Yet another one is 45 wt.% tungsten, 40.5% barium chromate, 14.5% potassium perchlorate, and 1% vinyl alcohol acetate resin binder. [3]
Chrome yellow or crocoite (PY34): lead chromate (PbCrO 4). ... Barium pigments. Barium sulfate (PW5 or baryte): barium sulfate (BaSO 4). Lithopone: BaSO 4 •ZnS ...
Barium chromate – used in delay compositions, e.g. in fireworks rockets; Lead chromate – used in delay compositions; Potassium dichromate – used infrequently as an oxidizer; can be used as a surface treatment for passivation of magnesium particles, also as a catalyst and in some matches; potassium perchlorate often added; Oxides and ...