ISSN

print 2570-7337
online 2570-7345

New found of gibbsite at the Hammerunterwiesenthal tephrite quarry, Krušné hory Mountains (Germany)


Volume 23, issue 2 (2015), pages 247-254

Keywords

Abstract

The new occurrence of well-crystaline Al-hydroxide, gibbsite, was found in the Hammerunterwiesenthal tephrite quarry in Erzgebirge (Germany). Gibbsite forms lustrous transparent pseudo-hexagonal tabular crystals, their twins and groups up to 3.5 mm in size. Gibbsite is monoclinic, space group P21/n with following unit-cell parameters: a 8.669(2) Å, b 5.070(2) Å, c 9.720(3) Å, β 94.54(3)°, V 425.9(2) Å3. Chemical analyses yield the average composition Al2O3 65.48, SiO2 0.04, H2Ocalc. 34.74, total 100.26 wt. % corresponding to the formula Al(OH)3 on the basis of 1 atom in cation sites. Raman spectrum is in good coincident with published data for this mineral phase and is considerably different from Raman spectra of another Al(OH)3 polymorphs. Gibbsite was found in the close association of natrolite. Natrolite is orthorhombic, space group Fdd2 with following unit-cell parameters: a 18.368(5) Å, b 18.591(7) Å, c 6.594(4) Å, V 2251(1) Å3 and its average composition Na2O 14.54, Al2O3 26.98, SiO2 45.24, K2O 0.04, CaO 1.46, H2Ocalc. 9.23, total 97.48 wt. % corresponding to formula (Na1.83Ca0.10)Σ1.93(Al2.07 Si2.94)∑5.01O10 . 2H2O on the basis 10 O.

Files

Abstract (PDF) - 210.14KB
Fulltext (PDF) - 2.58MB

References

Alberti A., Cruciani G., Dauru I. (1995) Order-disorder in natrolite-group minerals. Eur. J. Mineral. 7, 501-508.

Alberti A., Pongiluppi D., Vezzalini G. (1982) The crystal chemistry of natrolite, mesolite and scolecite. N. Jb. Mineral., Abh. 143, 231-248.

Čejka J., Sejkora J., Macek I., Frost R.L., López A., Scholz R., Xi Y. (2014) A vibrational spectroscopic study of a hydrated hydroxy-phosphate mineral fluellite, Al2(PO4)F2(OH).7H2O. Spectrochim. Acta A 126, 157-163.

Černý P., Černý P., Habermann V., Koloušek V., Ondruš P., Veselovský F. (2002) Mokrá u Žlutic, lokalita gibbsitu, böhmitu a zeolitů. Minerál 10, 6, 404-408.

Dana E. S. (1892) Dana’s system of mineralogy. (6th edition), John Wiley & sons, New York, 600-604.

Haake R., Flach S., Bode R. (1994) Mineralien und Fundstellen Deutschland. Teil 2, 70. Bode Verlag, Haltern.

Hoth K., Schellenberg F. (2006) Lagestätte Hammerunterwiesenthal, geologische Situation. Kartographie H. Eilers 2008.

Huneke J. T., Cramer R. E., Alavrez R., El-Swaify S. A. (1980) The identification of gibbsite and bayerite by laser Raman spectroscopy. J. Soil Sci. Soc. Am., 44, 130-134.

Keck E. (2004) Gonnardit aus dem Sächsischen Erzgebirge und aus Ostbayern. Lapis 29,11, 41-43.

Ksenofontov, D. A., Kabalov Y. K. (2012) Structure refinement and thermal stability of gibbsite. Inorg. Mat. 48, 2, 142-144.

Larsen A. O. (1981) Boehmite from syenite pegmatites in the Oslo region, Norway. Mineral. Record 12, 227-230.

Laugier J., Bochu B. (2011) LMGP-Suite of Programs for the Interpretation of X-ray Experiments. http://www.ccp14.ac.uk/tutorial/lmgp. přístup duben 2011.

Li X., Zhao D., Yang S., Wang D., Zhou Q., Liu G. (2014) Influence of thermal history on conversion of aluminate species in sodium aluminate solution. Transactions of Nonferrous Metals Society China 24, 3348-3355.

Libowitzky E. (1999) Correlation of O-H stretching frequencies and O-H…O hydrogen bond lengths in minerals. Monats. Chem. 130, 1047-1059.

Nakamoto K. (2009) Infrared and Raman spectra of inorganic and coordination compounds, Part A. Theory and application in inorganic chemistry. Wiley Hoboken New Jersey, 432 s.

Pouchou J. L., Pichoir F. (1985) “PAP” (φρZ) procedure for improved quantitative microanalysis. In: Microbeam Analysis (J. T. Armstrong, ed.). 104-106, San Francisco Press, San Francisco.

Ryskin Ya. I. (1974) The vibration of protons in minerals: hydroxyl, water and ammonium. In The infrared spectra of minerals (V.C. Farmer, ed.), 149-151, Mineralogical Society London. 

Rodgers K. A. (1992): Routine identification of aluminium hydroxide polymorphs with laser Raman microprobe. Clay Minerals 28, 85-99.

Ruan H .D., Frost R. L., Kloprogge J. T. (2001) Comparison of the Raman spectra of bayerite, boehmite, diaspore and gibbsite. J. Raman Spectrosc. 32, 745-750.

Rychlý R., Šrein V., Ulrych J. (1992) Amygdale cavity fillings of tephrite from ČeskéHamry, Krušné hory Mts., Bohemia. Acta Univ. Carol., Geol. 1-2, 225-238.

Saalfeld H., Wedde M. (1974) Refinement of the crystal structure of gibbsite, Al(OH)3. Zeit. Krist. 139, 129-135.

Sipos P. (2009) The structure of Al(III) in strongly alkaline aluminate solutions – A review. J. Molecular Liquids 246, 1-14. 

Vrtiška L. (2015) České Hamry a Hammerunterwiesenthal: dvě významná naleziště zeolitů v Krušných horách. Minerál, 28, 6, (v tisku).

Witzke T. (1994) Neufunde aus Sachsen (II): Nordstrandit vom Bärenstein bei Annaberg in Sachsen. Lapis 19, 10, 36-39.

www.geology.cz – mapový server České geologické služby; přístup říjen 2015.