Ferrotochilinite, 6FeS · 5Fe(OH)2, a new mineral from the Oktyabr’sky deposit, Noril’sk district, Siberia, Russia

Pekov, Igor V.; Sereda, E. V.; Polekhovsky, Yury S.; Britvin, Sergey N.; Чуканов, Н. В.; Yapaskurt, Vasiliy O.; Bryzgalov, I. A.

doi:10.1134/s1075701513070106

Cited by 18 publications

(27 citation statements)

References 4 publications

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“…; Pekov et al. ). Furthermore, HRTEM images indicate lattice fringes of 0.54 nm and SAED patterns show strong (002) diffraction spots along the c * axis consistent with tochilinite (Figs.…”

Section: Resultsmentioning

confidence: 97%

“…), ferrotochilinite (“Fe‐To”; Pekov et al. ), greenalite (“Gr”; Guggenheim et al. ), kamacite (“Ka”), and Mg‐tochilinite (“Mg‐To”; Organova et al.…”

Section: Resultsmentioning

confidence: 99%

“…However, the corresponding SAED pattern (collected from a small area of the needle-shaped crystals) indicates that this assemblage is poorly crystalline and shows several strong and weak broad rings at d-spacings of 0.54, 0.27, 0.25, and 0.18 nm, compatible with tochilinite reflections (Fig. 8d; Organova et al 1973;Pekov et al 2013). Furthermore, HRTEM images indicate lattice fringes of 0.54 nm and SAED patterns show strong (002) diffraction spots along the c* axis consistent with tochilinite ( Figs.…”

Section: Tochilinite Precipitationmentioning

confidence: 91%

“…Other tochilinite syntheses at 80-130°C show comparable Fe contents, with all Fe in the hydroxide layer (Kozerenko et al 1996(Kozerenko et al , 2001, whereas those at a temperature of >130°C have 30-70% Mg for n = 1.5-1.9 in the tochilinite formula (Kakos et al 1994;Kozerenko et al 2001;Chistyakova et al 2006;Gubaidulina et al 2007;Peng and Jing 2014). It has been proposed that Fe-tochilinite is metastable, with a kinetically controlled formation that requires depletion of Mg 2+ from solution and sufficiently high Fe 2+ and S 2activities at low temperature (Kozerenko et al 2001;Peng et al 2007;Pekov et al 2013). Nevertheless, This study Kozerenko et al (2001) demonstrated that the two main parameters controlling the stability field of tochilinite are sulfide concentration and temperature.…”

Section: Condition Of Tochilinite Formationmentioning

confidence: 99%

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Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Vacher

Truche

Fauré

et al. 2019

Meteorit & Planetary Scien

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Tochilinite/cronstedtite intergrowths are commonly observed as alteration products in CM chondrite matrices, but the conditions under which they formed are still largely underconstrained due to their scarcity in terrestrial environments. Here, we report low temperature (80 °C) anoxic hydrothermal experiments using starting assemblages similar to the constituents of the matrices of the most pristine CM chondrite and S‐rich and S‐free fluids. Cronstedtite crystals formed only in S‐free experiments under circumneutral conditions with the highest Fe/Si ratios. Fe‐rich tochilinite with chemical and structural characteristics similar to chondritic tochilinite was observed in S‐bearing experiments. We observed a positive correlation between the Mg content in the hydroxide layer of synthetic tochilinite and temperature, suggesting that the composition of tochilinite is a proxy for the alteration temperature in CM chondrites. Using this relation, we estimate the mean precipitation temperatures of tochilinite to be 120–160 °C for CM chondrites. Given the different temperature ranges of tochilinite and cronstedtite in our experiments, we propose that Fe‐rich tochilinite crystals resulted from the alteration of metal beads under S‐bearing alkaline conditions at T = 120–160 °C followed by cronstedtite crystals formed by the reaction of matrix amorphous silicates, metal beads, and water at a low temperature (50–120 °C).

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“…; Pekov et al. ). Furthermore, HRTEM images indicate lattice fringes of 0.54 nm and SAED patterns show strong (002) diffraction spots along the c * axis consistent with tochilinite (Figs.…”

Section: Resultsmentioning

confidence: 97%

“…), ferrotochilinite (“Fe‐To”; Pekov et al. ), greenalite (“Gr”; Guggenheim et al. ), kamacite (“Ka”), and Mg‐tochilinite (“Mg‐To”; Organova et al.…”

Section: Resultsmentioning

confidence: 99%

Section: Tochilinite Precipitationmentioning

confidence: 91%

Section: Condition Of Tochilinite Formationmentioning

confidence: 99%

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Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Vacher

Truche

Fauré

et al. 2019

Meteorit & Planetary Scien

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“…[224,225,226,227] These composite minerals comprise 6 mackinawite-like layers alternating with 5 brucite-like layers. [228] They can be grown below 200°C in alkaline hydrothermal solution, but as a result of the two-dimensional incommensurability of their sub-structures, they tend to curl into nanotubes.…”

Section: + ][Oh]2mentioning

confidence: 99%

Green Rust: The Simple Organizing ‘Seed’ of All Life?  <strong> </strong>

Russell

2018

Preprint

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The most important problem of synthetic biology is…the reduction of carbonic acid. and Without the idea of spontaneous generation and a physical theory of life, the doctrine of evolution is a mutilated hypothesis without unity or cohesion.[1] Leduc, [1]Abstract: Korenaga and coworkers present evidence to suggest that 4.3 billion years ago the Earth's mantle was dry and water filled the ocean to twice its present volume.[2] CO2 was constantly exhaled during the mafic to ultramafic volcanic activity associated with magmatic plumes that produced the thick, dense and relatively stable oceanic crust. In that setting two distinct major types of sub-marine hydrothermal vents were active: ~400°C acidic springs whose effluents bore vast quantities of iron into the ocean, and ~120°C, highly alkaline and reduced vents exhaling from the cooler, serpentinizing crust at some distance from the heads of the plumes. When encountering the alkaline effluents, the iron from the plume head vents precipitated out forming mounds likely surrounded by voluminous exhalative deposits similar to the banded iron formations known from the Archean. These mounds and the surrounding sediments likely comprising nanocrysts of the variable valence FeII/FeIII oxyhydroxide, green rust. The precipitation of green rust, along with subsidiary iron sulfides and minor concentrations of Ni, Co and Mo in the environment at the alkaline springs may have established both the key bio-syntonic disequilibria, and the means to properly make use of them -those needed to drive the essential inanimate-to-animate transitions that launched life. In the submarine alkaline vent model for the emergence of life specifically it is first suggested that the redox-flexible green rust microcrysts spontaneously formed precipitated barriers to the complete mixing of carbonic ocean and alkaline hydrothermal fluids, barriers that created and maintained steep ionic disequilibria; and second, that the hydrous interlayers of green rust acted as 'engines' that were powered by those ionic disequilibria and drove essential endergonic reactions. There, aided by sulfides and trace elements acting as catalytic promoters and electron transfer agents, nitrate could be reduced to ammonia and carbon dioxide to formate, while methane may have been oxidized to methyl and formyl groups. Acetate and higher carboxylic acids could then have been produced from these C1 molecules and aminated to amino acids, and thence oligomerized to offer peptide nests to phosphate and iron sulfides and secreted to form primitive amyloid-bounded structures, leading conceivably to protocells.

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Facile Synthesis and Characterization of Pure Tochilinite‐like Materials from Nanoparticulate FeS

Robl

Bolney

Grosch

et al. 2022

Zeitschrift anorg allge chemie

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In this work, three different tochilinite‐like materials have been obtained by sophisticated synthetic methods that allow to control the distribution of iron ions. The purity of the samples was confirmed by powder X‐ray diffraction. From elemental analysis and Mössbauer spectroscopy data, detailed compositions could be determined: T1) Fe0.76S*0.86 [Fe2+0.01Fe3+0.56Mg2+0.43(OH)2.01]; T2) Fe0.89S*0.85 [Fe2+0.55Fe3+0.11Al3+0.33(OH)1.84(O)0.16]; T3) Fe0.71S*0.79 [Fe2+0.25Fe3+0.73Mg2+0.01Al3+0.01(OH)1.98(O)0.02]. These compositions fit to typical compositions of tochilinite in regard of the amount of iron vacancies and the volume ratio of the hydroxide layers to the sulfide layers. Besides hydroxide ions, oxide ions are also present in the hydroxide layers as a result of surface oxidation after the synthesis due to the high reactivity of the particles. TEM and SEM investigations show that the obtained powders consist mainly of thin sheets accompanied by nanotubes with BET surface areas ranging between 20 m2/g and 40 m2/g. The thermal stability was investigated by TGA and DSC analysis and it depends significantly on the composition.

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Ferrotochilinite, 6FeS · 5Fe(OH)2, a new mineral from the Oktyabr’sky deposit, Noril’sk district, Siberia, Russia

Cited by 18 publications

References 4 publications

Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Green Rust: The Simple Organizing ‘Seed’ of All Life?  <strong> </strong>

Facile Synthesis and Characterization of Pure Tochilinite‐like Materials from Nanoparticulate FeS

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Ferrotochilinite, 6FeS · 5Fe(OH)2, a new mineral from the Oktyabr’sky deposit, Noril’sk district, Siberia, Russia

Cited by 18 publications

References 4 publications

Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Deciphering the conditions of tochilinite and cronstedtite formation in CM chondrites from low temperature hydrothermal experiments

Green Rust: The Simple Organizing &lsquo;Seed&rsquo; of All Life?&nbsp;&nbsp;<strong> </strong>

Facile Synthesis and Characterization of Pure Tochilinite‐like Materials from Nanoparticulate FeS

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Green Rust: The Simple Organizing ‘Seed’ of All Life? <strong> </strong>