Chromium Hydr oxides

1 Cr O, from Fluka Properties BET specific surface area 4inV , XRD and TGA results available [1244]. 

2 Amperit 704.1 from Stark, Fused Original and plasma-sprayed. Properties Eskolaite, original and after spraying, XRD patterns available, specific surface area original 0.2 iiT/g, after spraying 2.8 iiT/g [1003]. 

1 Recipe from Ref. [1078] Nitrate was adjusted to pH 2 with HNO, and then treated with excess of ammonia. The precipitate was washed with water, calcined at 600°C for 5 h, washed with water again, calcined at 600-1400°C for 3 h, and washed with water again. 

Properties Rhombohedral CtiOj-type structure [1077,1078], lattice spacing data available [1077], specific surface area available [1078]. 

Temperature (°C) Electrolyte T Method Instrument Crushed Reference 

---

Chromium lll) is mostly present in particular form [as Cr(III)(hydr)oxide] and adsorbed to particles. Cr(VI) occurs in dissolved form as Cr04. ... 

K. Ndung u, S. Friedrich, A. R. Gonzalez, A. R. Flegal (2010) Chromium oxidation by manganese (hydr)oxides in a California aquifer. Appl. Geochem., 25, 377-381. 

During the reaction hexavalent chromium is partially reduced to trivalent chromium, forming a complex mixture consisting largely of hydrated (hydr) oxides of both chromium and aliuninum ... 

---