enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Calcium–aluminium-rich inclusion - Wikipedia

    en.wikipedia.org/wiki/Calcium–aluminium-rich...

    A calcium–aluminium-rich inclusion or CaAl-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.

  3. Krotite - Wikipedia

    en.wikipedia.org/wiki/Krotite

    Krotite was reported in 2011 [3] in a calcium-aluminium-rich inclusion (CAI) in the carbonaceous chondrite meteorite NWA (North West Africa) 1934, which landed in Morocco. [4] The mineral name was approved by the International Mineralogical Association (IMA 2010-038) [ 5 ] and honors Alexander N. Krot, a researcher in cosmochemistry at the ...

  4. Aluminium alloy inclusions - Wikipedia

    en.wikipedia.org/wiki/Aluminium_alloy_inclusions

    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 ...

  5. Calcium aluminate cements - Wikipedia

    en.wikipedia.org/wiki/Calcium_aluminate_cements

    The main constituent, and also the most reactive phase, of calcium aluminate cements is the monocalcium aluminate (CaAl 2 O 4 = CaO · Al 2 O 3, also written as CA in the cement chemist notation). It usually contains other calcium aluminates as well as a number of less reactive phases deriving from impurities in the raw materials.

  6. AFm phases - Wikipedia

    en.wikipedia.org/wiki/AFm_phases

    The replacement of one divalent Ca 2+ cation by a trivalent Al 3+ cation, or to a lesser extent by a Fe 3+ cation, with a Ca:Al ratio of 2:1 (one Al substituted for every 3 cations) causes an excess of positive charge in the sheet: 2[2Ca (OH) 2 ·(Al,Fe)(OH) 2] + to be compensated by 2 negative charges X –.

  7. US military appeals court says plea deals related to 9/11 ...

    www.aol.com/news/us-military-appeals-court-says...

    A U.S. military appeals court has ruled that plea deals related to the man accused of masterminding the Sept. 11, 2001, attacks and two accomplices can proceed after Defense Secretary Lloyd Austin ...

  8. 2 kindergarteners wounded in Northern California school ...

    www.aol.com/suspect-dead-shooting-northern...

    Six-year-old Roman Mendez (left) and 5-year-old Elias Wolford (right) were wounded during a shooting at the Feather River School of Seventh-Day Adventists in Butte County on Wednesday, Dec. 4.

  9. Human Rights Watch warns of new threats to privacy, press ...

    www.aol.com/news/human-rights-watch-warns...

    Human Rights Watch expressed concerns on Thursday about two new laws in El Salvador related to cybersecurity and data protection, which the group said could threaten freedom of speech and of the ...