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A calcium–aluminium-rich inclusion or Ca–Al-rich inclusion (CAI) is a submillimeter- to centimeter-sized light-colored calcium- and aluminium-rich inclusion found in carbonaceous chondrite meteorites. The four CAIs that have been dated using the Pb-Pb chronometer yield a weighted mean age of 4567.30 ± 0.16 Myr.
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 ...
New research links omega-6 fatty acids, commonly found in seed oils, and colon cancer growth. But there’s more to the story—and study if you read it carefully.
The polymorphs differ in terms of the stacking of the layers. All forms of Al(OH) 3 crystals are hexagonal [disputed – discuss]: gibbsite is also known as γ-Al(OH) 3 [8] or α-Al(OH) 3 [citation needed] bayerite is also known as α-Al(OH) 3 [8] or β-alumina trihydrate [citation needed] nordstrandite is also known as Al(OH) 3 [8] doyleite
Concerned about how declining populations will affect everything from economic growth to national security, the number of countries trying to increase birthrates grew from 19 in 1986 to 55 in 2015 ...
The Puerto Rico Aqueducts and Sewers Authority (PRASA; Spanish: Autoridad de Acueductos y Alcantarillados de Puerto Rico) is a water company and the government-owned corporation responsible for water quality, management, and supply in Puerto Rico, a US insular area. [1]
President-elect Donald Trump appears remotely for a sentencing hearing in front of New York State Judge Juan Merchan in the criminal case in which he was convicted in 2024 on charges involving ...
The Ministry for the Ecological Transition and the Demographic Challenge (MITECO) is the department of the Government of Spain responsible for developing the government policy on fight against climate change, prevention of pollution, protecting the natural heritage, biodiversity, forests, sea, water and energy for a more ecological and productive social model. [3]