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WOS: 000183262100003 A fluorite mineralization is observed within the sediment rock, having dimensions of about 60 m in length and between 0.4-2 m in thickness is found in the Feke (Adana) region. In this study, it is aimed to explain the genesis of this deposit by means of rare element geochemistry analyses. The fluorite samples analysed showed low REE-contents (REE < 10 ppm) on the average which are characteristics for Fluorite sedimental-diagenetic origin. The carbonate host-rocks are about ten times richer on REE. The REE-distribution pattern of fluorite and host-rocks are marked through strong enrichments and negative slopes. The Cc and Eu anomalities indicates an oxidative conditions by the fluorite-precipitate. In the Tb/Ca and Tb/La diagram all the fluorite samples lie in the sedimentary field. All the data indicate that, fluorite-deposits occured during diagenetic events which caused the intraformational formation water migration in the carbonate sedimentary environment as well as its alteration effect with surface-solutions.

A fluorite mineralization is observed within the sediment rock, having dimensions of about 60 m in length and between 0.4-2 m in thickness is found in the Feke (Adana) region. In this study, it is aimed to explain the genesis of this deposit by means of rare element geochemistry analyses. The fluorite samples analysed showed low REE-contents (REE < 10 ppm) on the average which are characteristics for Fluorite sedimental-diagenetic origin. The carbonate host-rocks are about ten times richer on REE. The REE-distribution pattern of fluorite and host-rocks are marked through strong enrichments and negative slopes. The Ce and Eu anomalities indicates an oxidative conditions by the fluorite-precipitate. In the Tb/Ca and Tb/La diagram all the fluorite samples lie in the sedimentary field. All the data indicate that, fluorite-deposits occured during diagenetic events which caused the intraformational formation water migration in the carbonate sedimentary environment as well as its alteration effect with surface-solutions.

Bi2Te2WO10 crystallises in the monoclinic system (space group C2/c, Z = 4) with a = 12.4972(7) A, b = 5.6414(3) A, c = 12.2705(6) A and β = 91.38(3)°. The structure has been solved by means of single crystal X-ray diffraction data analysis. The reliability factors are R1 = 0.030 and wR2 = 0.065 for 1258 structure factors and 70 parameters. The Bi2Te2WO10 crystal structure can be described as a regular stacking along the Ox axis of polyhedral layers with the stereochemically active lone pairs E of the BiIII and TeIV atoms all located between these layers. The cohesion of the three-dimensional network is therefore only ensured between succesive layers by weak BiO(5) bonds. Kristallstruktur einer neuen kationengeordneten Phase des Fluorit-Typs: Bi2Te2WO10 Bi2Te2WO10 kristallisiert monoklin, RG. C2/c, Z = 4 mit a = 12.4972(7) A, b = 5.6413(3) A, c = 12.2705(6) A und β = 91.38(3)°. Die Struktur wurde durch Einkristall-Rongtenstrukturanalyse bestimmt. Die Gutefaktoren sind R1 = 0.030 und wR2 = 0.065 fur 1258 unabh. Reflexe und 70 Parameter. Die Bi2Te2WO10-Struktur wird beschrieben als regelmasige Stapel langs der Ox-Achse aus vielflachigen Schichten mit dem zwischen diesen befindlichen stereochemisch aktiven Paar E von BiIII und TeIV Atomen. Der Zusammenhalt der Raumnetzstruktur erfolgt deshalb allein durch die aufeinanderfolgenden Schichten mit den schwachen Bindungen BiO(5).