... in parentheses): x in Fe(SO 4 )(OH)(H 2 O) x Δ f H ° (kJ·mol −1 ) S ° (J·K –1 ·mol –1 ) Δ f G ° (kJ·mol −1 ) log K sp Fe(SO 4 )(OH) 0 −1160.2 ± 2.3 145.9 ± 1.2 −1013.7 ± 2.4 −2.862 Metahohmannite 1.5 −1608.2 ± 1.7 (200.3) −1373.6 ± 1.8 −3.594 Butlerite 2 −1758.0 ± 1.7 (214.0) −1492.7 ± 1.8 −3.685 Parabutlerite 2...

... vacancies in one of two independent iron sites. Ordering of iron vacancies gives rise to domains containing butlerite-like 7 Å chains of corner-connected octahedra and tetrahedra. The formation of these chains within (100) planes results in an expansion of the monoclinic a lattice parameter...

...L. Fanfani; A. Nunzi; P. F. Zanazzi Abstract The mineral butlerite is one of the two naturally occurring polymorphic modifications of the sulfate Fe[SO 4 (OH)·2H 2 0. Butlerite is monoclinic, space group P 2 1 / m . The cell dimensions are a = 6.50(1) Å, b = 7.37(1) Å, c = 5.84(l) Å, β =108°23'(5...

..., temperatures and [Fe]/[K] ratios. Thermal and chemical analyses are consistent with a model for non-stoichiometry in which domains of stoichiometric jarosite are intergrown with butlerite-like iron-deficient domains with a composition [Fe 2 (SO 4 ) 2 (OH) 2 (H 2 O) 4 ]. It was found that heterogeneous...

..., and hexahydrite, but other ammonium minerals (salammoniac, mascagnite, clairite, boussingaultite, efremovite, koktaite, mohrite, ammoniojarosite, godovikovite, letovicite) as well as native sulfur, millosevichite, alunogen, metavoltine, voltaite, gypsum, anhydrite, halotrichite, butlerite, jarosite, and copiapite...

..., brookite, butlerite, calcite, cassiterite, celestine, chalcostibite, corundum, cryolite, derbylite, diaphorite, dolomite, euxenite-(Y), columbite-(Fe) (also known as ferrocolumbite), glaucodot, gudmundite, gypsum, haindingerite, hausmannite, hematite, ilmenite, iodargyrite, linarite, kotoite, marcasite...

... closely related, structurally similar species, possibly mixed with other Fe 3+ sulfates such as butlerite or parabutlerite, or perhaps (para)coquimbite, fibroferrite, or metahohmanite. Such an assemblage is consistent with formation in a highly oxidized, relatively dehydrated environment with the bulk...

...G. R. Rossman Abstract Optical and infrared absorption and magnetic susceptibility data are reported for the ferric iron hydroxy sulfate minerals and compounds: basic iron sulfate, Fe(0H)S0 4 ; butlerite, Fe(0H)S0 4 .2H 2 0; parabutlerite, Fe(0H)S0 4 .2H 2 0; fibroferrite, Fe(0H)S0 4 .5H 2 0...