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Pentacalcium trialuminate, 5CaO·3Al 2 O 3 (C 5 A 3), forms only under an anhydrous and oxygen free atmosphere. The crystal is orthorhombic, with a density of 3067 kg·m −3. It reacts rapidly with water. Tetracalcium trialuminate, 4CaO·3Al 2 O 3 (C 4 A 3), is a metastable phase formed by dehydrating 4CaO·3Al 2 O 3 ·3H 2 O (C 4 A 3 H 3).
The following inclusion types can also be found in aluminium alloys: alumina needles (Al 2 O 3), nitrides (AlN), iron oxides (FeO), manganese oxides (MnO), fluorides (Na 3 AlF 6, NaF, CaF 2, …), aluminium borides (AlB 2, AlB 12), borocarbides (Al 4 C 4 B). Bone ash (Ca 3 (PO 4) 2) sometimes added to patch cracks in the trough can be found as ...
Calcium aluminoferrite (Ca 2 (Al,Fe) 2 O 5) is a dark brown crystalline phase commonly found in cements. In the cement industry it is termed tetra-calcium aluminoferrite or ferrite. In cement chemist notation (CCN), it is abbreviated as C 4 AF meaning 4CaO· Al 2 O 3 · Fe 2 O 3 in the oxide notation. It also exists in nature as the rare ...
A typical composition [4] is Ca 0.93 Al 1.94 Fe 0.11 Si 0.02 O 4. It reacts rapidly with water, forming the metastable hydrate CaO·Al 2 O 3 ·10H 2 O, or a mixture of 2CaO·Al 2 O 3 ·8H 2 O, 3CaO·Al 2 O 3 ·6H 2 O and Al(OH) 3 gel. These reactions form the first stage of strength development in calcium aluminate cements.
2CaO·SiO 2, larnite (Ca 2 SiO 4) 3CaO·SiO 2, alite or (Ca 3 SiO 5) 3CaO·2SiO 2, (Ca 3 Si 2 O 7) CaO·SiO 2, wollastonite (CaSiO 3). This article focuses on Ca 2 SiO 4, also known as calcium orthosilicate. It is also referred to by the shortened trade name Cal-Sil or Calsil. All calcium silicates are white free-flowing powders.
Aluminium carbonate (Al 2 (CO 3) 3), is a carbonate of aluminium.It is not well characterized; one authority says that simple carbonates of aluminium are not known. [2] However related compounds are known, such as the basic sodium aluminium carbonate mineral dawsonite (NaAlCO 3 (OH) 2) and hydrated basic aluminium carbonate minerals scarbroite (Al 5 (CO 3)(OH) 13 •5(H 2 O)) and ...
Louis Lépecq de La Clôture (12 July 1736 – 5 November 1804) was a French surgeon and epidemiologist. His work consisted mainly of a 15-year observation of the relations between climate, geography and pathologies in Normandy .
He was the son of Vincent-Matthias Ponchet de la Riviere, [2] the Lord Lieutenant of Alsace, and his wife, Marie Betauld; the nephew of Michel Poncet de la Rivière , the 61st Bishop of Uzès (1677–1728); [3] the uncle of Mathias Poncet de la Rivière, the 90th Bishop of Troyes (1742–1758); [4] and the cousin of Joseph Poncet de la Rivière ...