There several possibilities: 1  A threatened miscarriage is when you are showing signs that you may be about to miscarry. 2  Not all threatened miscarriages actually miscarry. 3  If you have cramps, or you are bleeding, but your cervix is not opening, then you may be diagnosed with a threatened miscarriage.
Iron(III) oxide is a product of the oxidation of iron. It can be prepared in the laboratory by electrolyzing a solution of sodium bicarbonate, an inert electrolyte, with an iron anode: 4 fe + 3 o 2 + 2 h 2 o â 4 feo(oh)
Iron(II,III) sulfide is a blue-black (sometimes pinkish) chemical compound of iron and sulfur with formula Fe 3 S 4 or FeSÂ·Fe 2 S 3, which is much similar to iron(II,III) oxide.It occurs naturally as the sulfide mineral greigite and is magnetic. It is a bio-mineral produced by and found in magnetotactic bacteria.ike the related oxide magnetite (Fe 3 O 4), iron(II,III) sulfide is ferrimagnetic, with the spin magnetic moments of the Fe cations in the tetrahedral sites oriented in the opposite direction as those in the octahedral sites, and a net magnetization.