Important Update News

The RRUFF Project is being updated to improve its interface and content. The beta version of the update is accessible to the public at RRUFF.net. New data is only being added to the beta site. Please note that it is in development, and some components are not functional. Existing RRUFF.info links will resolve to the new site after RRUFF.net is officially released.

We are grateful to NASA for the funding of this effort.

Cronstedtite R061026

Browse Search Results 
<< Previous |  Back to Search Results |  Next >> 
Record 634 of 2398  


Name: Cronstedtite
RRUFF ID: R061026
Ideal Chemistry: (Fe2+,Fe3+)3(Si,Fe3+)2O5(OH)4
Locality: Kisbanya, Hungary
Source: Michael Scott S101349 [view label]
Owner: RRUFF
Description: Black elongated prismatic crystals with triangular cross-sections, polytype 3T
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Groups: [ Clay (86) ] [ serpentine (12) ]
CHEMISTRY 
RRUFF ID: R061026.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Fe2+2.13Fe3+0.87)Σ=3(Si1.13Fe3+0.87)Σ=2O5(OH)4 ; Fe2 and Fe3 splitted by stoichiometry (sum of cations = 5) and charge balance
Microprobe Data File: [ Download Excel File ]
RAMAN SPECTRUM 
RRUFF ID:
Sample Description: Unoriented sample
DOWNLOADS:

  To download sample data,
  please select a specific
  orientation angle.
Direction of polarization of laser relative to fiducial mark:
X Min:    X Max:    X Sort:
BROAD SCAN WITH SPECTRAL ARTIFACTS
RRUFF ID: R061026
Wavelength:
Sample Description: Unoriented sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
DOWNLOADS:

Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R061026.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 3.177(2)Å    b: 3.177(2)Å    c: 21.29(1)Å
alpha: 90°    beta: 90°    gamma: 120°   Volume: 186.1(1)Å3    Crystal System: hexagonal
  File Type Information Close
Calculated diffraction file.

  File Type Information Close
Output file from the Bruker D8 Advance instrument. Includes device headers and XY data.

DOWNLOADS:

DIF File
X-ray Data (XY - RAW) View Graph
RRUFF File
X Min:    X Max:    X Sort:
REFERENCES for Cronstedtite

American Mineralogist Crystal Structure Database Record: [view record]

Anthony J W, Bideaux R A, Bladh K W, and Nichols M C (1990) Handbook of Mineralogy, Mineral Data Publishing, Tucson Arizona, USA, by permission of the Mineralogical Society of America. [view file]

Steinmann J (1821) Chemische Untersuchung des Cronstedtit's, eines neuen Fossils von Pribram in Böhmen, Journal für Chemie und Physik, 32, 69-100   [view file]

Wiewióra A (1990) Crystallochemical classifications of phyllosilicates based on the unified system of projection of chemical composition: III. The serpentine-kaolin group, Clay Minerals, 25, 93-98   [view file]

Hybler J (2006) Parallel intergrowths in cronstedtite-1T: determination of the degree of disorder, European Journal of Mineralogy, 18, 197-205

Hybler J, Sejkora J, Venclík V (2016) Polytypism of cronstedtite from Pohled, Czech Republic, European Journal of Mineralogy, 28, 765-775

Hybler J (2016) Crystal structure of cronstedtite-6T2, a non-MDO polytype, European Journal of Mineralogy, 28, 777-788

Hybler J, Števko M, Sejkora J (2017) Polytypism of cronstedtite from Nižná Slaná, Slovakia, European Journal of Mineralogy, 29, 91-99

Pignatelli I, Mugnaioli E, Marrocchi Y (2018) Cronstedtite polytypes in the Paris meteorite, European Journal of Mineralogy, 30, 349-354