Walstromite R070634
Name: Walstromite
RRUFF ID: R070634
Ideal Chemistry: BaCa2Si3O9
Locality: Esquire number 8 mine, Big Creek, Fresno County, California, USA
Source: Michael Scott S100311 [view label]
Owner: RRUFF
Description: Colorless massive with pronounced cleavage, strong orange-pink fluorescence under long-wave ultraviolet light
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
CHEMISTRY 
RRUFF ID: R070634.2
Sample Description: Microprobe Fragment
Measured Chemistry: (Ba0.96Sr0.02Ca0.02)Σ=1(Ca1.98Mn0.02)Σ=2Si3.00O9; trace amounts of Ti
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: R070634
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: R070634.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 6.751(1)Å    b: 9.630(3)Å    c: 6.697(2)Å
alpha: 69.61(1)°    beta: 102.23(1)°    gamma: 96.92(2)°   Volume: 398.3(1)    Crystal System: triclinic
  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 Walstromite

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]

Alfors J T, Stinson M C, Matthews R A, Pabst A (1965) Seven new barium minerals from eastern Fresno County, California, American Mineralogist, 50, 314-340   [view file]

Dent Glasser L S, Glasser F P (1968) The crystal structure of walstromite, American Mineralogist, 53, 9-13   [view file]

Joswig W, Paulus E F, Winkler B, Milman V (2003) The crystal structure of CaSiO3-walstromite, a special isomorph of wollastonite-II, Zeitschrift für Kristallographie, 218, 811-818

Dorsam G, Liebscher A, Wunder B, Franz G, Gottschalk M (2009) Crystal structure refinement of synthetic Ca0.43Sr0.57[SiO3]-walstromite and walstromite-fluid Ca-Sr distribution at upper-mantle conditions, European Journal of Mineralogy, 21, 705-714