E-viri
Recenzirano
-
Kampf, Anthony R
The American mineralogist, 11/2009, Letnik: 94, Številka: 11-12Journal Article
Based on single-crystal structure refinements, miguelromeroite, Mn5(H2O)4(AsO3OH)2(AsO4)2, from the Ojuela mine, Mapimi, Durango, Mexico, is described as a new species corresponding to the Mn-dominant member of a series with sainfeldite, Ca5(H2O)4(AsO3OH)2(AsO4)2, and type villyaellenite, (Mn,Ca)Mn2Ca2(H2O)4(AsO3OH)2(AsO4)2, from Sainte-Marie aux Mines, Alsace, France, is redefined as an ordered intermediate species in the series. Miguelromeroite is monoclinic, C2/c, a=18.030(1), b=9.2715(5), c=9.7756(5) Å, β = 96.266(2)°, V=1624.4(2) Å3, Z=4. At the Ojuela mine, miguelromeroite occurs as a compact spray of orange-pink, prismatic crystals up to 4 cm in length. Crystals are elongate on 001 with forms {100}, {110} and {101̄}. Physical properties: pale pink streak, transparent, vitreous luster, brittle, good {100} cleavage, conchoidal fracture, Mohs hardness approximately 4, measured density 3.69(3) g/cm3, and calculated density 3.714 g/cm3. Optical properties: biaxial (-), nα 1.713(2), nβ 1.723(2), nγ 1.729(2), 2Vmeas 70(5)°, 2Vcalc 75°, orientation X=b, Zc= 40° in obtuse β, pleochroic pale pink, Z>>X>Y. Miguelromeroite is named for Miguel Romero Sanchez (1926-1997) in recognition for his dedication to documenting and preserving Mexico's rich mineral heritage. Miguelromeroite also occurs at the Veta Negra mine, Tierra Amarilla, Copiapo Province, Chile, at Sterling Hill, Ogdensburg, Sussex County, New Jersey, and at the Gozaisho mine, Iwaki, Fukushima Prefecture, Honshu Island, Japan. Some material from the Gozaisho mine may correspond to another ordered species in the series with the formula (Ca,Mn)Mn2Ca2(H2O)4(AsO3OH)2(AsO4)2.
Avtor
![loading ... loading ...](themes/default/img/ajax-loading.gif)
Vnos na polico
Trajna povezava
- URL:
Faktor vpliva
Dostop do baze podatkov JCR je dovoljen samo uporabnikom iz Slovenije. Vaš trenutni IP-naslov ni na seznamu dovoljenih za dostop, zato je potrebna avtentikacija z ustreznim računom AAI.
Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
---|---|---|---|---|---|---|---|---|
JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
---|
Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
---|
Vir: Osebne bibliografije
in: SICRIS
To gradivo vam je dostopno v celotnem besedilu. Če kljub temu želite naročiti gradivo, kliknite gumb Nadaljuj.