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Antipinite, KNa3Cu2(C2O4)(4), a new mineral species from a guano deposit at Pabellon de Pica, Chileстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 24 октября 2016 г.
- Авторы: Chukanov Nikita V., Aksenov Sergey M., Rastsvetaeva Ramiza K., Lyssenko Konstantin A., Belakovskiy Dmitriy I., Faerber Gunnar, Moehn Gerhard, Van Konstantin V.
- Журнал: Mineralogical Magazine
- Том: 79
- Номер: 5
- Год издания: 2015
- Издательство: Mineralogical Society
- Местоположение издательства: United Kingdom
- Первая страница: 1111
- Последняя страница: 1121
- DOI: 10.1180/minmag.2015.079.5.07
- Аннотация: The new oxalate mineral antipinite is found in a guano deposit located on the Pabellon de Pica Mountain, Iquique Province, Tarapaca Region, Chile. Associated minerals are halite, salammoniac, chanabayaite, joanneumite and clays. Antipinite occurs as blue, imperfect, short prismatic crystals up to 0.1 mm x 0.1 mm x 0.15 mm in size, as well as their clusters and random aggregates. The mineral is brittle. Mohs hardness is 2; D-meas = 2.53(3), D-calc = 2.549 g cm(3). The infrared spectrum shows the presence of oxalate anions and the absence of absorptions associated with H2O molecules, C-H bonds, CO32, NO3 and OH ions. Antipinite is optically biaxial (+), alpha = 1.432(3), beta = 1.530(1), gamma = 1.698(5), 2V(meas) = 75(10)degrees, 2V(calc) = 82 degrees. The chemical composition (electron-microprobe data, C measured by gas chromatography of products of ignition at 1200 degrees C, wt.%) is Na2O 15.95, K2O 5.65, CuO 27.34, C2O3 48.64, total 99.58. The empirical formula is K0.96Na3.04Cu2.03(C2.00O4)(4) and the idealized formula is KNa3Cu2(C2O4)(4). The crystal structure was solved and refined to R = 0.033 based upon 4085 unique reflections with I > 2 sigma(I). Antipinite is triclinic, space group P (1) over bar, a = 7.1574(5), b = 10.7099(8), c = 11.1320(8) angstrom, alpha = 113.093(1), beta = 101.294(1), gamma = 90.335 (1)degrees, V = 766.51(3) angstrom(3), Z = 2. The strongest reflections of the powder X-ray diffraction pattern [d, angstrom (I,%) (hkl)] are 5.22 (40) (1 (1) over bar1), 3.47 (100) (0 (3) over bar2), 3.39 (80) ((2) over bar 10), 3.01 (30) (0 (3) over bar3, 220), 2.543 (40) (122, 0 (3) over bar4, (1) over bar 04), 2.481 (30) ((2) over bar 13), 2.315 (30) (1 (4) over bar3, (3) over bar 10), 1.629 (30) (1 (4) over bar6, (4) over bar(1) over bar4, (2) over bar 43, (1) over bar 60).
- Добавил в систему: Аксенов Сергей Михайлович