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4) are the two end-members of the olivine solid-solution series, varying in Mg 2+ and Fe 2+ in their chemical composition. So, the chemical formula of olivine can be better expressed as Mg (2−x) Fe x SiO 4 or Mg x Fe (2−x) SiO 4. As another example, the tectosilicate feldspar can be described as a solid solution of the endmembers K-feldspar ...
Fayalite (Fe 2 SiO 4, commonly abbreviated to Fa) is the iron-rich end-member of the olivine solid-solution series. In common with all minerals in the olivine group, fayalite crystallizes in the orthorhombic system (space group Pbnm) with cell parameters a 4.82 Å, b 10.48 Å and c 6.09 Å.
Carolyn & Olivia: This puzzle’s theme was born as part of a broader Discord chat among various crossword constructor friends back in March. We were joking about the large number of nascent theme ...
Orange forsterite with a portion of tephroite. Pure forsterite is composed of magnesium, oxygen and silicon. The chemical formula is Mg 2 SiO 4.Forsterite, fayalite (Fe 2 SiO 4) and tephroite (Mn 2 SiO 4) are the end-members of the olivine solid solution series; other elements such as Ni and Ca substitute for Fe and Mg in olivine, but only in minor proportions in natural occurrences.
Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.
Nebraska Gov. Jim Pillen is recovering from serious but non-life-threatening injuries after being bucked off a horse, his office said Monday. Pillen, 68, was initially transported to Columbus ...
Brazil's top public prosecutor is not likely to issue any indictments until next year for former President Jair Bolsonaro, members of his government and military officers who allegedly planned a ...
Monticellite and kirschsteinite (commonly also spelled kirschteinite [3]) are gray silicate minerals of the olivine group with compositions Ca Mg Si O 4 and CaFeSiO 4, respectively.. Most monticellites have the pure magnesium end-member composition but rare ferroan monticellites and magnesio-kirschsteinite are found with between 30 and 75 mol.% of the iron end memb