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Franklinite is an oxide mineral belonging to the normal spinel subgroup's iron (Fe) series, with the formula Zn 2+ Fe 2 3+ O 4.. As with another spinel member magnetite, both ferrous (2+) and ferric (3+) iron may be present in franklinite samples.
2 Si 2 O 5 (OH) 4 ·2H 2 O), halloysite-7Å (Al 2 Si 2 O 5 (OH) 4) and gibbsite (Al(OH) 3) are thought to be products of tuff weathering. Betalommosovite was described by Gerasimovskiy and Kazakova (1962) and discredited by the IMA-CNMMN (IMA1967 s.p.). It was published without approval and listed as discredited on the 'IMA/CNMNC List of ...
2 O 5 4) minerals, resulting from the metamorphism of the minerals that are contained in mafic to ultramafic rocks. [6] They may contain minor amounts of other elements including chromium, manganese, cobalt or nickel. In mineralogy and gemology, serpentine may refer to any of the 20 varieties belonging to the serpentine subgroup. Owing to ...
The formula of the admixture of the three most common endmembers is written as Ca 10 (PO 4) 6 (OH,F,Cl) 2, and the crystal unit cell formulae of the individual minerals are written as Ca 10 (PO 4) 6 (OH) 2, Ca 10 (PO 4) 6 F 2 and Ca 10 (PO 4) 6 Cl 2. The mineral was named apatite by the German geologist Abraham Gottlob Werner in 1786, although ...
Category: Minerals by element. ... Iron minerals (4 C, 95 P, 2 F) L. Lanthanide minerals (6 C, 35 P) Lanthanum minerals (5 P) Lead minerals (140 P) Lithium minerals ...
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Armalcolite is a titanium-rich mineral that falls under the magnesianferropseudobrookite mineral group with Fe 2+ Ti 2 O 5 and MgTi 2 O 5 as end members. [8] Due to having octahedral symmetry, armalcolite has solid solution (cation substitution) between multiple elements Fe 2+ , Fe 3+ , Mg, Al, and Ti; this is because of their similarities in ...
Polyhedral representation of spinel MgAl 2 O 4. Spinel (/ s p ɪ ˈ n ɛ l, ˈ s p ɪ n əl / [7]) is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula MgAl 2 O 4 in the cubic crystal system. Its name comes from the Latin word spinella, a diminutive form of spine, in reference to its pointed crystals. [5]