title: Calcinaksite, KNaCa(Si4O10) H2O, a new mineral from the Eifel volcanic area, Germany
metadata.name: dc.contributor.author
metadata.value: Chukanov, N.V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Aksenov, S.M.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Rastsvetaeva, R.K.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Blass, G.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Varlamov, D.A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Pekov, I.V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Belakovskiy, D.I.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Gurzhiy, Vladislav V.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2016-05-06T14:03:17Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2016-05-06T14:03:17Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2015-08
metadata.lang: -
metadata.name: dc.identifier.issn
metadata.value: 0930-0708
metadata.lang: -
metadata.name: dc.identifier.other
metadata.value: 10.1007/s00710-015-0376-4
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/2252
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The new mineral calcinaksite, ideally KNaCa(Si4O10) · H2O, the first hydrous and Ca-dominant member of the litidionite group, is found in a xenolith of metamorphosed carbonate-rich rock from the southern lava flow of the Bellerberg volcano, Eastern Eifel region, Rheinland-Pfalz, Germany. It is associated with wollastonite, gehlenite, brownmillerite, Ca2SiO4 (larnite or calcio-olivine), quartz, aragonite, calcite, jennite, tobermorite and ettringite. Calcinaksite occurs as clusters of colourless to light-grey subhedral prismatic crystals. The mineral is brittle, with Mohs’ hardness of 5; Dmeas is 2.62(2) g/cm3 and Dcalc is 2.623 g/cm3. The IR spectrum shows the presence of H2O molecules forming three different H-bonds. Calcinaksite is optically biaxial (+), α = 1.542(2), β = 1.550(2), γ = 1.565(3), 2V meas = 75(10). The chemical composition (electron-microprobe data, H2O determined by the Alimarin method, wt%) is: Na2O 6.69, K2O 12.01, CaO 15.04, FeO 0.59, SiO2 61.46, H2O 4.9, total 100.69. The empirical formula is H2.11 K0.99Na0.84Ca1.04Fe0.03Si3.98O11. The crystal structure was solved and refined to R 1 = 0.053, wR 2 = 0.075 based upon 3057 reflections having I > 3σ(I). Calcinaksite is triclinic, space group P 1¯¯¯ , a = 7.021(2), b = 8.250(3), c = 10.145(2) Å. α = 102.23(2)°, β = 100.34(2)°, γ = 115.09(3)°, V = 495.4(3) Å3, Z = 2. The strongest reflections of the X-ray powder pattern [d, Å (I,%) (hkl)] are: 3.431 (70) (−121, −211, −210, 012, 0–22), 3.300 (67) (−031), 3.173 (95) (−103, −201, −220, 003, 111), 3.060 (100) (−212, 2–11, −221, 200, −1-13, 021, −202), 2.851 (83) (0–23, −122, 1–13, 1–31), 2.664 (62) (1–23, −222, 201).
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: en
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: Springer
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Mineralogy and Petrology;V. 109. Issue 4
metadata.lang: -
metadata.name: dc.title
metadata.value: Calcinaksite, KNaCa(Si4O10) H2O, a new mineral from the Eifel volcanic area, Germany
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 2015_Chukanov_Calcinaksite_Miner Petrol.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/2252/1/2015_Chukanov_Calcinaksite_Miner%20Petrol.pdf
resources.format: Adobe PDF
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