Halotrichite - Wikipedia
网页Halotrichite, also known as feather alum, is a highly hydrated sulfate of aluminium and iron. Its chemical formula is FeAl 2 (SO 4) 4 ·22H 2 O. It forms fibrous monoclinic crystals. The crystals are water-soluble. It is formed by the weathering and decomposition of pyrite commonly near or in volcanic vents.
Halotrichite: Mineral information, data and localities. - mindat.org
网页About Halotrichite Hide. Colourless to white, yellowish, greenish; colourless in transmitted light. Named in 1839 by Ernst Friedrich Glocker from the Greek αλζ meaning salt and τρικοζ meaning hair. Latin form is "halotrichum," which in turn is from the older German name "Haarsalz" (hair salt).
Halotrichite: Mineral information, data and localities.
网页Halotrichite. Dubník, Červenica, Prešov District, Prešov Region, Slovakia. Hide all sections | Show all sections. About Halotrichite Hide. Formula: FeAl2(SO4)4 · 22H2O. Colour: Colourless to white, yellowish, greenish; colourless in transmitted light. Lustre: Silky. Hardness: 1½ - 2. Specific Gravity: 1.89. Crystal System: Monoclinic. Member of:
Halotrichite | Sulfate Mineral, Copper-Iron, Evaporite | Britannica
网页Halotrichite, a sulfate mineral containing aluminum and iron [FeAl2 (SO4)4·22H2O]. If more than 50 percent of the iron has been replaced by magnesium, the mineral is called pickeringite. These minerals are usually weathering products of sedimentary rocks that contain aluminum and metallic sulfides.
Halotrichite Mineral Data
网页Halotrichite. Comments: White, fibrous halotrichite on rock. Location: Willi Agatz Mine, Dresden, Saxony, Germany. Scale: Picture size 4.5 cm. © Thomas Witzke / Abraxas-Verlag
网页Halotrichite Fe2+Al2(SO4)4 •22H2O. Crystal Data: Monoclinic. Point Group: 2/m. As acicular crystals, only very rarely terminated, elongated along [001], to 1 cm; asbestiform, in divergent or matted aggregates, and as incrustations and efflorescences. Physical Properties: Cleavage: On {010}, poor. Fracture: Conchoidal.
Synthesis and vibrational spectroscopy of halotrichite and …
网页2011年6月1日 · The synthetic halotrichite XRD pattern matches well with the reference halotrichite pattern 00-039-1387, confirming the successful synthesis of halotrichite. The absence of iron (II) sulphate and aluminium sulphate peaks in the halotrichite sample confirms that a relatively pure halotrichite forms.
Molecular structure of halotrichite using selected spectroscopic ...
网页2011年5月17日 · Halotrichite also known as feather alum is a highly hydrated sulphate of aluminium and iron. It is completely soluble in acid solutions. Halotrichite group has a general formula AB 2 (XO 4 ) 4 ·H 2 O, where A stands for Fe–Mg–Mn–Zn in a tetrahedral hole, B for Al and X for S [1] .
Natural halotrichites—an EDX and Raman spectroscopic study
网页2007年7月17日 · Raman spectroscopy has been used to characterise four natural halotrichites: halotrichite FeSO 4.Al 2 (SO 4) 3. 22H 2 O, apjohnite MnSO 4.Al 2 (SO 4) 3.22H 2 O, pickingerite MgSO 4.Al 2 (SO 4) 3.22H 2 O and wupatkiite CoSO 4.Al 2 (SO 4) 3.22H 2 O. A comparison of the Raman spectra is made with the spectra of the equivalent synthetic pseudo-alums.
铁铝矾-Halotrichite-矿物介绍-矿物百科-石器时代 - 矿物晶体-矿 …
网页铁铝矾是一些含铝和金属硫化物的沉积岩风化的产物，因此常常呈粉状。 铁铝矾中的铁有时会被镁置换掉，这样就变成了镁铝矾。 国内最权威矿物百科知识库,收集五百多种矿物资料和数万张矿物图片！
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