IMPORTANT MESSAGE. We need your support now to keep mindat.org running. Click here to find out why.
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for Educators
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Colinowensite

This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About ColinowensiteHide

Colin R. Owen
Formula:
BaCuSi2O6
Colour:
Purple to dark blue (when thicker)
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
4.20
Crystal System:
Tetragonal
Name:
Named in honor of Colin R. Owen (b. 1937), a mineral dealer from Somerset West, South Africa.
New structure type.

Found in the Central-Eastern orebody of the Wessel's mine.


Classification of ColinowensiteHide

Approved
Approval Year:
2012
First Published:
2015

Physical Properties of ColinowensiteHide

Vitreous
Transparency:
Opaque
Colour:
Purple to dark blue (when thicker)
Streak:
Purple
Hardness:
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
4.20(5) g/cm3 (Measured)    4.236 g/cm3 (Calculated)

Optical Data of ColinowensiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.740 - 1.745 nε = 1.735(20)
Max Birefringence:
δ = 0.005 - 0.015
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Pleochroism:
Strong
Comments:
Purple along the c axis to blue in a perpendicular direction

Chemical Properties of ColinowensiteHide

Formula:
BaCuSi2O6

Crystallography of ColinowensiteHide

Crystal System:
Tetragonal
Class (H-M):
4/mmm (4/m 2/m 2/m) - Ditetragonal Dipyramidal
Space Group:
I41/acd
Cell Parameters:
a = 9.967(1) Å, c = 22.290(2) Å
Ratio:
a:c = 1 : 2.236
Unit Cell V:
2221.4 ų
Z:
16
Morphology:
{100} and {110}. {001} is always present as a cleavage planes.

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
5.577 (31)
4.997 (30)
4.560 (31)
3.533 (70)
2.985 (100)
2.499 (57)
2.280 (23)
1.767 (19)

Type Occurrence of ColinowensiteHide

Place of Conservation of Type Material:
Type material is preserved in the collections of the Institute für Mineralogie und Kristallographie, University of Vienna, Vienna, Austria, catalogue number HS13.097.
Reference:
Rieck B., Pristacz H. and Giester G. (2015) Colinowensite, BaCuSi2O6, a new mineral from the Kalahari Manganese Field, South Africa and new data on wesselsite, SrCuSi4O10. Mineralogical Magazine: 79(7): 1769-1778.

Synonyms of ColinowensiteHide

Fluorescence of ColinowensiteHide

None observed

Other InformationHide

Notes:
Not soluble in acids except HF
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for ColinowensiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Finger, L.W., Hazen, R.M., Hemley, R.J. (1989) BaCuSi2O6: A new cyclosilicate with four-membered tetrahedral rings. American Mineralogist: 74: 952-955.
Sparta, K.M., Roth, G. (2004) Reinvestigation of the structure of BaCuSi2O6 - evidence for a phase transition at high temperature. Acta Crystallographica: B60: 491-495.
Rieck, B. (2013) Colinowensite, IMA 2012-060. CNMNC Newsletter No. 15, February 2013, page 6. Mineralogical Magazine: 77: 1-12.
Chen, Y., Zhang, Y., Feng, S. (2014) Hydrothermal synthesis and properties of pigments Chinese purple BaCuSi2O6 and dark blue BaCu2Si2O7. Dyes and Pigments: 105: 167-173.
Rieck B., Pristacz H. and Giester G. (2015) Colinowensite, BaCuSi2O6, a new mineral from the Kalahari Manganese Field, South Africa and new data on wesselsite, SrCuSi4O10. Mineralogical Magazine: 79(7): 1769-1778.
Belakovskiy, D.I., Cámara, F., Gagné, O.C. (2016) New mineral names. American Mineralogist: 101: 2355-2360.
Shapenkov, S.V., Zolotarev, A.A. Jr., Zhitova, E.S., Krivovichev, S.V., Krzhizhanovskaya, M.G. (2017) High-temperature behavior of synthetic analogues of scottyite BaCu2Si2O7 and colinowensite BaCuSi2O6. Zapiski RMO: 146: 125-134.

Internet Links for ColinowensiteHide

Localities for ColinowensiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
South Africa (TL)
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Rieck, B. (2013) Colinowensite, IMA 2012-060. CNMNC Newsletter No. 15, February 2013, page 6; Mineralogical Magazine, 77, 1-12.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2018, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: October 22, 2018 17:26:10 Page generated: September 27, 2018 10:58:25
Go to top of page