[PDF] Top 20 Raman spectroscopic study of the mineral qingheiite Na2 (Mn

... The qingheiite sample studied in this work was collected from the Santa Ana pegmatite, ...Argentina. The mineral occurs as a pri- mary mineral in lithium bearing pegmatite, in ... See full document

... between the silicate layers and are coordinated alternately to pairs of tetrahedral apices along the chains on oppo- site sides of the mirror ...and Raman spectra of ... See full document

... cules. The aluminum atoms are situated at centers of symmetry and are bonded octahedrally to two centro-symmetric pairs of oxy- gen atoms and one pair of fluorine ...ions. Raman ... See full document

... in the chain and the water molecules ties the sheets together ...in the production of boric acid, but it is still used in the production of borax, borax hydrates and ... See full document

... genesis of leightonite is related to low acidity conditions [1] and from acid solutions at fairly high temperatures ...in the scientific literature. Thermodynamic study of leightonite was ... See full document

... a study of the mineral brianyoungite using a combination of SEM, EDX and Raman and infrared ...derivative of hydroz- incite in which some carbonate units are replaced by ... See full document

... No Raman spectroscopic analyses of pectolite and related min- erals have been ...in the RRUFF data base but no band assignments are ...Studies of hydrogen bonding in silicates relates ... See full document

... knowledge of the 1:1 kaolinite type minerals through the study of a specific member of this group, the mineral ...fraipontite. The vibrational spectra ... See full document

... to the pronounced difference in the Mn content. The structure of both poldervaartite and olmiite can be schematically described, for convenience, as a sequence along [0 1 0] of ... See full document

... for the study of mineral structure. Raman spectroscopy is an important tool in the characterization of phosphates in complex paragenesis ...years, spectroscopic ... See full document

... for the study of mineral structures [14–19]. The objective of this research is to report the Raman and infrared spectra of vantasselite and to relate ... See full document

... but of special interest to mineralogists. Some studies of wardite and the structurally related mineral cyrilovite have been undertaken by the authors ...this study to further our ... See full document

... lack of information on the vibrational spec- tra of ...harmotome. The reason for such a lack of information is not known; yet the mineral contains water and siloxane ... See full document

... to study the vibrational spectroscopy of kam- phaugite-(Y) as there have been very few studies of this mineral as is evidenced in the literature ...part of a complex ... See full document

... for the character- ization of secondary uranyl containing minerals ...[17–23]. The aim of this research is the study of Raman spectra of the natural ... See full document

... analysis of paravauxite single crys- tals was carried out using EPMA, with a Jeol JXA8900R spectrome- ter from the Physics Department of the Federal University of Minas Gerais, Belo ... See full document

... for the study of minerals [8–14]. Indeed, Raman spectroscopy has proven most useful for the study of diagenetically related minerals where iso- morphic substitution may ... See full document

... lack of information on the vibrational spec- tra of ...ardennite-(As). The reason for such a lack of information is not known; yet the mineral contains OH units, siloxane ... See full document

... Crystals of ushkovite were placed on a polished metal surface on the stage of an Olympus BHSM microscope, which is equipped with 10, 20, and 50 ...objectives. The microscope is part ... See full document

... phate of Y and RE elements and has monoclinic symmetry with space group ...spectra of churchite-(Y) were published by Sejk- ora et ...[7]. The Raman spectrum and structural analysis of ... See full document