Ikaite is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. Ikaite tends to form very steep or spiky pyramidal crystals, often radially arranged, of varied sizes from thumbnail size aggregates to gigantic salient spurs.

Dec 17, 2022 · Calcium carbonate hexahydrate (ikaite) is a rare mineral that forms as metastable species in the organic-carbon-rich sediments of the King George Basin, Bransfield Strait, Antarctica, as a consequence of early diagenetic decomposition of organic matter under cold water (−1.4 °C) and high pressure (200 bar) conditions.

May 18, 2020 · We found that ikaite precipitated at temperatures of at least 35 °C at pH 9.3 −10.3 from a mixture of natural seawater and sodium carbonate rich solution. At pH 9.3, we observed pseudomorphic...

Ikaite – the icy version of calcium carbonate from Antarctica Link Natural Ikaite Link. Calcium carbonate can crystallize in a hydrated form as ikaite at low temperatures. The hydration water in ikaite records the d18O of ambient water, a feature potentially useful for …

Dec 19, 2012 · Ikaite (CaCO 3 · 6H 2 O) is a monoclinic carbonate that is metastable at temperatures approximately above 4°C (for stability conditions at high pressure, see Marland, 1975a, b; for stability conditions at low pressure, see Bischoff et al., 1993a).

Ikaite is the mineral name for the hexahydrate of calcium carbonate, CaCO3·6H2O. Ikaite is colorless when pure. It is usually considered a rare mineral, but this is likely due to difficulty in preserving samples. Ikaite is a metastable and has only been observed in nature at …

Oct 1, 2022 · Ikaite is a rare, metastable form of hydrated calcium carbonate (CaCO 3 ·6H 2 O) that may be synthesised under certain physical and chemical conditions, and is found naturally occurring in a range of different environments (e.g. Council and Bennett, 1993, Pauly, 1963, Suess et al., 1982, Zhou et al., 2015).

Apr 1, 2022 · Ikaite was first discovered as a synthetic laboratory mineral by the French chemist Pelouze (1865), who correctly identified it as a phase of calcium carbonate.

Ikaite is a rare mineral that is chemically identical to calcite, but has a different crystal form which contains water in its structure. It is found naturally growing in places that are characterized by low temperatures and unusual chemistry.

Glendonites are pseudomorphs after the mineral ikaite, a monoclinic mineral with composition CaCO 3 ·6H 2 O. Ikaite forms in near-freezing waters. It requires pressures exceeding those of the deepest ocean to be thermodynamically stable (Marland, 1975 ).