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AlPO 4 ·2H 2 O dihydrate is found as the minerals variscite and meta-variscite. [14] Aluminium phosphate dihydrate (variscite and meta-variscite) has a structure that can be regarded as an assembly of tetra- and octahedral units of phosphate anions, aluminium cations and water. Al 3+ ions are 6-coordinate and PO 4 3-ions are 4-coordinate. [3]
Secondary phases are typically nonconductive; however, small and controlled amounts of AlPO 4 exert a densification effect which affects in a positive way the overall ionic conductivity of the material. [3] The prefactor σ 0 in the Arrhenius equation can in turn be written as a function of fundamental constants and conduction parameters: [16]
Variscite is a hydrated aluminium phosphate mineral (AlPO 4 ·2H 2 O). It is a relatively rare phosphate mineral. It is sometimes confused with turquoise; however, variscite is usually greener in color. The green color results from the presence of small amounts of trivalent chromium (Cr 3+). [5]
Alberto Geddis Martinez, better known as Alpo Martinez, Abraham G. Rodriquez (witness protection), or more simply as Alpo or Po (June 8, 1966 – October 31, 2021) was an American drug dealer from Harlem, New York City. He rose to prominence in the mid–1980s.
Amblygonite (/ æ m ˈ b l ɪ ɡ ə ˌ n aɪ t /) is a fluorophosphate mineral, (Li,Na)AlPO 4 (F,OH), composed of lithium, sodium, aluminium, phosphate, fluoride and hydroxide. The mineral occurs in pegmatite deposits and is easily mistaken for albite and other feldspars. Its density, cleavage and flame test for lithium are diagnostic.
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ALPO's "Lunar Recorder" for 1957-1961 was Alika K. Herring, an individual whose drawings of lunar craters would appear several times in the astronomical magazine Sky & Telescope. [4] Herring would help determine astronomical seeing conditions in Hawaii in conjunction with observations taken by Franklin E. Roach (not ALPO affiliated) that would ...
The Chinese spy balloon that traversed across the US in 2023 was secretly fitted out with American technology that may have allowed it to spy on Americans.