Interrelationships in the Gypsum–Syngenite–Görgeyite System and Their Possible Formation on Mars

García‐Florentino, Cristina; Gómez‐Nubla, Leticia; Huidobro, Jennifer; Torre‐Fdez, I.; Ruíz-Galende, Patricia; Aramendia, Julene; Hausrath, Elisabeth M.; Castro, Kepa; Arana, Gorka; Madariaga, Juan Manuel

doi:10.1089/ast.2020.2319

Cited by 9 publications

(6 citation statements)

References 44 publications

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“…The Raman spectrum of görgeyite is characterized by the bands that appear at 429 (w), 439 (w), 475 (w), 480 (m), 604 (w), 631 (m), 661 (w), 980 (s), 1005 (vs), 1012 (vs), 1116 (w), 1138 (w), 1163 (w), 1188 (w), 1216 (vw), 3310 (broad, b), 3412 (b), 3498 (b) and 3527 (b) cm −1 (García-Florentino and others, 2021).…”

Section: Resultsmentioning

confidence: 90%

“…The Raman spectrum of syngenite is characterized by the bands that appear at 132 (very weak, vw), 179 (vw), 200 (vw), 239 (vw), 428 (m), 441 (strong, s), 473 (m), 493 (m), 608 (m), 621 (m), 633 (m), 644 (m) 661 (m), 982 (vs), 1006 (vs), 1083 (vw), 1140 (vw), 1166 (vw) and 3309 (m) cm −1 (García-Florentino and others, 2021).…”

Section: Resultsmentioning

confidence: 92%

“…Previously synthesized gypsum, syngenite and görgeyite powders were used as reagents for this work (García-Florentino and others, 2021).…”

Section: Samplesmentioning

confidence: 99%

“…Some of the minerals detected by both instruments were kieserite (MgSO 4 .H 2 O), an unspecified hydrated sulfate, gypsum [CaSO 4 .2H 2 O] (Huidobro and others, 2022 b b ), phyllosilicates (kaolinite [Al 2 Si 2 O 5 (OH) 4 ] (Brindley and Robinson, 1946) and montmorillonite [(Ca,Na) 0.16 (Al,Mg,Fe) 2.08 (Si,Al) 4 O 10 (OH) 2 ⋅nH 2 O]) (Uddin, 2008), among others (Cloutis and others, 2007; Nazari-Sharabian and others, 2020). Previously, it was already indicated that the unknown sulfate found by OMEGA and CRISM is magnesium and calcium-rich (Chou and Seal, 2007), so it is possible that this sulfate could be syngenite [K 2 Ca(SO 4 ) 2 .H 2 O] and/or görgeyite [K 2 Ca 5 (SO 4 ) 6 .H 2 O] (García-Florentino and others, 2021).…”

Section: Introductionmentioning

confidence: 99%

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The effect of low temperature on the Raman spectra of calcium-rich sulfates on Mars

et al. 2023

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Raman spectra (532 nm diode laser) of gypsum, syngenite and görgeyite powders were studied from 273 to 83 K every −10 K. Although it was found that not all the Raman peaks are temperature-sensitive, the effect of temperature on the Raman signal of some bands was modelled. It was observed that the main bands of the three sulfates shift toward higher wavenumbers as temperature decreases. The strengthening of the bonds causes an increase in energy and, consequently, higher wavenumbers. However, –OH bands shift depending on the crystal structure they acquire as the temperature decreases, so not all –OH bands behave in the same way. Finally, the gypsum –OH bands change to more ordered crystalline structures with decreasing temperature, so their bandwidths become narrower and sharper.

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 92%

“…Previously synthesized gypsum, syngenite and görgeyite powders were used as reagents for this work (García-Florentino and others, 2021).…”

Section: Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effect of low temperature on the Raman spectra of calcium-rich sulfates on Mars

et al. 2023

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“…The formation of hydrated potassium calcium sulfates is strongly temperature dependent; no gorgeyite K 2 SO 4 •5CaSO 4 •H 2 O crystallisation is observed at temperatures below 40 • C [30,35]. Syngenite K 2 Ca(SO 4 ) 2 •H 2 O was by chance synthesized due to the interaction of hydroxyapatite Ca 10 (PO 4 ) 6 (OH) 2 and potassium hydrosulfate KHSO 4 in an acetone medium in conditions of mechanical activation (Reaction (4)) [36].…”

Section: Introductionmentioning

confidence: 99%

Materials in the CaO-K2O-SO3-H2O System Based on Powder Mixtures including Calciolangbeinite K2Ca2(SO4)3 and Calcium Sulfate Anhydrite CaSO4

et al. 2023

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Materials (cement stone samples) in the CaO-K2O-SO3-H2O system with the target phase compositions, including syngenite K2Ca(SO4)2·H2O and calcium sulfate dihydrate CaSO4·2H2O, were prepared from powder mixtures of calcium sulfate anhydrite CaSO4, and/or calciolangbeinite K2Ca2(SO4)3, and potassium sulfate K2SO4 via hydration reactions at a water/powder ratio within an interval of 0.5–0.9. It was revealed that samples with contents of 25, 50, 75 and 100 mol% of syngenite K2Ca(SO4)2·H2O demonstrated a nonlinear dependence of their respective microstructures on their phase compositions. The microstructures of samples with phase compositions of 25 and 75 mol% of syngenite K2Ca(SO4)2·H2O consisted of pillar crystals. The microstructures of samples with phase compositions of 50 and 100 mol% of syngenite K2Ca(SO4)2·H2O consisted of plate crystals. An explanation of microstructure formation was set forth, taking into account equilibria of the dissolution–crystallization processes during cement stone formation. Materials obtained in the CaO-K2O-SO3-H2O system consisting of biocompatible and resorbable (soluble in water) phases can be recommended for testing as potential substances for bone defect treatments.

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Reviewing in situ analytical techniques used to research Martian geochemistry: From the Viking Project to the MMX future mission

Huidobro

Aramendia

Arana

et al. 2022

Analytica Chimica Acta

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Interrelationships in the Gypsum–Syngenite–Görgeyite System and Their Possible Formation on Mars

Cited by 9 publications

References 44 publications

The effect of low temperature on the Raman spectra of calcium-rich sulfates on Mars

The effect of low temperature on the Raman spectra of calcium-rich sulfates on Mars

Materials in the CaO-K2O-SO3-H2O System Based on Powder Mixtures including Calciolangbeinite K2Ca2(SO4)3 and Calcium Sulfate Anhydrite CaSO4

Reviewing in situ analytical techniques used to research Martian geochemistry: From the Viking Project to the MMX future mission

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