Alstonite R090049
Name: Alstonite
RRUFF ID: R090049
Ideal Chemistry: BaCa(CO3)2
Locality: Admiralty flats, Haggs mine, Nentsberry, Cumbria, England
Source: Bob Jenkins
Owner: RRUFF
Description: Clusters of colorless pyramidal crystals. We have posted cell parameters that match those in the literature, but do not represent the correct cell. The crystals are twinned.
Status: The identification of this mineral is confirmed by single-crystal X-ray diffraction and chemical analysis.
Mineral Group: [ Alstonite (2) ]
Quick search: [ All Alstonite samples (2) ]
CHEMISTRY 
RRUFF ID: R090049.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ba0.99(Ca0.99Sr0.05)Σ=1.04(CO3)2
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: R090049
Wavelength:
Sample Description: Unoriented Sample
Instrument settings: Thermo Almega XR 532nm @ 100% of 150mW
DOWNLOADS:

Raman Data (Processed)
RRUFF File
Raman Data (RAW) View Graph
RRUFF File
POWDER DIFFRACTION 
RRUFF ID: R090049.9
Sample Description: Single crystal, powder profile is calculated
Cell Refinement Output: a: 30.231(3)Å    b: 17.459(2)Å    c: 6.1242(7)Å
alpha: 89.888(3)°    beta: 89.982(3)°    gamma: 89.972(3)°   Volume: 3232.4(9)Å3    Crystal System: triclinic
DOWNLOADS:
X Min:    X Max:    X Sort:
REFERENCES for Alstonite

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]

Breithaupt J F A (1841) Holoëdrites syntheticus oder Alstonit, in Vollständige Charakteristik des Mineral-Systems 2nd Edition Arnoldische Buchhandlung Dresden and Leipzig 255-256   [view file]

Goβner B, Muβgnug F (1930) Über Alstonit und Milarit, Centralblatt für Mineralogie, Geologie und Paläontologie, 1930, 220-238

Sartori F (1975) New data on alstonite, Lithos, 8, 199-207

Roberts A C (1978) Mineralogical study of an unnamed barium calcium carbonate from the Cave-in-Rock district, Illinois, Geological Survey of Canada Paper, 78-1C, 49-52   [view file]

Roberts A C (1979) Paralstonite: A new mineral from the Minerva No. 1 mine, Cave-in-Rock, Illinois, Geological Survey of Canada Paper, 79-1C, 99-100   [view file]

Kapustin Y L (1980) Alstonite, barytocalcite and norsethite, in Mineralogy of Carbonatites Amerind Publishing Co. Pvt. Ltd. New Delhi 151-153

Young B, Greenbank L, Nancarrow P H A (1990) Alstonite in situ at Brownley Hill mine, Nenthead, Cumbria, Mineralogical Magazine, 54, 515-516   [view file]

Bindi L, Roberts A C, Biagioni C (2020) The crystal structure of alstonite, BaCa(CO3)2: an extraordinary example of ‘hidden’ complex twinning in large single crystals, Mineralogical Magazine, 84, 699-704   [view file]