Howlite R050588
Name: Howlite
RRUFF ID: R050588
Ideal Chemistry: Ca2SiB5O9(OH)5
Locality: Lake Bras d'Or, Iona, Cape Breton Island, Victoria County, Nova Scotia, Canada
Source: Rock Currier [view label]
Owner: RRUFF
Description: Group of tan colored tabular to prismatic single crystals
Status: The identification of this mineral has been confirmed by X-ray diffraction and chemical analysis
Quick search: [ All Howlite samples (2) ]
CHEMISTRY 
RRUFF ID: R050588.2
Sample Description: Microprobe Fragment
Measured Chemistry: Ca2.01B5.00Si0.99O9(OH)5 ; B and OH not measured but estimated by difference 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: R050588
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
INFRARED SPECTRUM (Attenuated Total Reflectance) 
RRUFF ID: R050588.1
Instrument settings: SensIR Durascope on a Nicolet Magna 860 FTIR
Resolution:
DOWNLOADS:

Infrared Data (Processed)
RRUFF File
X Min:    X Max:    X Sort:
POWDER DIFFRACTION 
RRUFF ID: R050588.1
Sample Description: Powder
Cell Refinement Output: a: 12.803(1)Å    b: 9.346(1)Å    c: 8.6064(7)Å
alpha: 90.°    beta: 104.836(6)°    gamma: 90.°   Volume: 995.5(1)Å3    Crystal System: monoclinic
  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.

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

DOWNLOADS:

Cell Refinement Data
Cell Refinement Output Data
DIF File
X-ray Data (XY - Processed)
RRUFF File
X-ray Data (XY - RAW) View Graph
RRUFF File
X Min:    X Max:    X Sort:
REFERENCES for Howlite

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]

Dana J D, Brush G J (1868) 601. Howlite, in A System of Mineralogy, Fifth Edition John Wiley and Sons New York 598-598   [view file]

How H (1868) II. Contributions to the mineralogy of Nova Scotia. III. Borates and other minerals in anhydrite and gypsum. Silicoborocalcite, a new mineral, The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 35, 32-41   [view file]

Papezik V S, Fong C C K (1975) Howlite and ulexite from the carboniferous gypsum and anhydrite beds in western Newfoundland, The Canadian Mineralogist, 13, 370-376   [view file]

Papezik V S, Fong C C K (1976) Howlite and ulexite from carboniferous gypsum and anhydrite beds in western Newfoundland — addendum, The Canadian Mineralogist, 14, 393-393   [view file]

Griffen D T (1988) Howlite, Ca2SiB5O9(OH)5: Structure refinement and hydrogen bonding, American Mineralogist, 73, 1138-1141   [view file]

Grice J D, Gault R A, Van Velthuizen J (2005) Borate minerals of the Penobsquis and Millstream deposits, southern New Brunswick, Canada, The Canadian Mineralogist, 43, 1469-1487   [view file]