What's the difference between anatase and octahedrite?

Anatase

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(1) Anatase and rutile are titanium dioxides (TiO2) with different crystal lattices.
(2) Biological studies of two titanium dioxide polymorphs, rutile and anatase, have produced conflicting results.
(3) However, anatase, because of its hemolytic activity in vitro and slow lung clearance, should warrant further research regarding its toxicity.
(4) We exposed rats to an aerosol of either anatase or rutile and determined the TiO2 retention in the lung up to 132 days post exposure.
(5) The other more boxlike crystals (coesite, anatase, and rutile) displayed little change in these parameters.
(6) Three different hydrogenases (isolated from Clostridium pasteurianum, Desulfovibrio desulfuricans strain Norway 4 and D. baculatus 9974) added to a suspension of TiO2 (anatase) powder are able to catalyze H2 evolution under band gap illumination of the semiconducting particles, and in the presence of EDTA or methanol as electron donor.
(7) The crystals studied were quartz, tridymite, cristobalite, coesite, anatase, and rutile.
(8) The evidence suggests that both anatase and rutile are "nuisance" dusts.
(9) Rutile and anatase induced similar effects, and both had a very low biological activity in comparison to alpha-quartz.
(10) The biological reactivity of two crystalline forms of titanium dioxide, rutile and anatase, has been compared in in vitro and in vivo assays.
(11) Pure rutile or anatase preparations show only a weak chemiluminescent response.

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