Antimony sesquioxide

Antimony Trioxide. Antimony(III) oxide (antimony sesquioxide) [1309-64-4] Sb203, is dimorphic, existing in an orthorhombic modification valentinite [1317-98-2] is colorless (sp gr 5.67) and exists in a cubic form and senarmontite [12412-52-17, Sb O, is also colorless (sp gr 5.2). The cubic modification is stable at temperatures below 570°C and consists of discrete Sb O molecules. The molecule is similar to that of P40 and As O and consists of a bowed tetrahedron having antimony atoms at each corner united by oxygen atoms lying in front of the edges. This solid crystallizes in a diamond lattice with an Sb O molecule at each carbon position. 

AntimonyCIII) phosphate, 3 65 Antimony potassium tartrate (tartar emetic), 3 66 Antimony red, 3 44 Antimony selenide, 3 57 Antimony sesquioxide. See Antimony trioxide... 

SYNS A 1530 A 1582 A 1588LP AMSPEC-KR ANTIMONIOUS OXIDE ANTIMONY(3+) OXIDE ANTIMONY PEROXIDE ANTIMONY SESQUIOXIDE... 

Protactinium(IV) oxydifluoride, PaOF2, is the only tetravalent protactinium oxydihalide not yet characterized. This seems to be due solely to a lack of investigation since there are no negative reports concerning the most likely routes involving interaction of the tetrafluoride and either protactinium dioxide or antimony sesquioxide, both of which methods have been employed for the preparation of the other tetravalent oxydihalides. 

As mentioned above, protactinium(V) oxytribromide is invariably obtained as a by-product during the preparation of the pentabromide. It is also formed (32, 45) when stoichiometric amounts of the penfa-bromide and either oxygen [Eq. (6)] or antimony sesquioxide [Eq. (7)] are heated together in a sealed vessel at 350°C. Although it is found with... 

The oxytriiodide, PaOIs, and dioxymonoiodide, PaOgl, have both been prepared (40) by reacting the pentaiodide with the stoichiometric amount of antimony sesquioxide [Eqs. (9) and (10)]. PaOIs, a dark brown solid, is thermally unstable [Eq. (11)] in vacuo like certain of the oxychlorides and oxybromides. The positions of the protactinium-oxygen... 

ANTIMONY SESQUIOXIDE (1309-64-4) Ignites and burns in heated air above 420°F/215°C. Violent reaction with bromine trifluoride. Reacts with chlorinated rubber, alco-hols/glycols, organic and a-hydroxy acids (fruit acids), o-dihydric phenols, polyethylene glycol, and other poly hydroxy compounds. 

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