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Mineralogical ClassificationCrystal structure of tyrolite
20th Sep 2005 14:17 UTCUwe Kolitsch
Material from type locality Schwaz; crystal structure solved from single-crystal synchrotron data; crystal data: monoclinic, P2/c, a = 27.562(3), b = 5.5682(7), c = 10.466(2) A, beta = 98.074(11)°, V = 1590.3 A3; the cell is similar to that of "clinotyrolite", a mineral not approved by the IMA.
Structure description: The structure is based upon 2 nm-thick copper arsenate layers with complex architecture; there are five Cu(II) sites. The layers are insulated by Ca2+ cations, CO32- groups and H2O molecules. The layers are held together by hydrogen groups.
Since it is well-known that also carbonate-free varieties of tyrolite exist, "tyrolite" may actually represent two or more minerals/polytypes.
Uwe Kolitsch
16th May 2006 10:26 UTCUwe Kolitsch Manager
Have updated the file with the structural data and the new ref.
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Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: April 25, 2024 09:39:04