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Colinowensite

A valid IMA mineral species

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Search Photos of Colinowensite

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Colinowensite, etc.

Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Colinowensite, etc.

Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

Colinowensite, etc.

Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

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About ColinowensiteHide

Colin R. Owen

Formula:

BaCuSi₂O₆

Colour:

Purple to dark blue (when thicker)

Lustre:

Vitreous

Hardness:

Specific Gravity:

4.20

Crystal System:

Tetragonal

Name:

Named in honor of Colin R. Owen (1937 - 26 October 2020), a mineral dealer from Somerset West, South Africa. He provided the first specimens for study.

Type Locality:

ⓘ Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

New structure type.

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

Unique IdentifiersHide

Mindat ID:

43366

Long-form identifier:

mindat:1:1:43366:6

GUID
(UUID V4):

12f6997c-f0b1-4485-838b-1504433eea33

IMA Classification of ColinowensiteHide

IMA status:

Approved

Approval year:

2012

First published:

2015

Type description reference:

Rieck, B., Pristacz, H., 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 doi:10.1180/minmag.2015.079.7.04

Classification of ColinowensiteHide

Strunz-mindat (2024):

9.C0.

9 : SILICATES (Germanates)
C : Cyclosilicates
0 :

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Symbol	Source	Reference
Cwn	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of ColinowensiteHide

Lustre:

Vitreous

Transparency:

Opaque

Colour:

Purple to dark blue (when thicker)

Streak:

Purple

Hardness:

4 on Mohs scale

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:

n_ω = 1.740 - 1.745 n_ε = 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.

Chemistry of ColinowensiteHide

Mindat Formula:

BaCuSi₂O₆

Elements listed:

Ba, Cu, O, Si - search for minerals with similar chemistry

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 Å³

Morphology:

{100} and {110}. {001} is always present as cleavage planes.

Crystal StructureHide

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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure

ID	Species	Reference	Link	Year	Locality	Pressure (GPa)	Temp (K)
0018747	Colinowensite	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		2004	synthetic	0	293
0020059	Colinowensite	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		2014	synthetic	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Colinowensite'
loop_
_publ_author_name
'Sparta K M'
'Roth G'
_journal_name_full 'Acta Crystallographica, Section B'
_journal_volume 60 
_journal_year 2004
_journal_page_first 491
_journal_page_last 495
_publ_section_title
;
 Reinvestigation of the structure of BaCuSi2O6 - evidence for a phase
 transition at high temperature
 Note: T = 293 K
;
_database_code_amcsd 0018747
_chemical_compound_source 'Synthetic'
_chemical_formula_sum 'Ba Cu Si2 O6'
_cell_length_a 10.0091
_cell_length_b 10.0091
_cell_length_c 22.467
_cell_angle_alpha 90
_cell_angle_beta 90
_cell_angle_gamma 90
_cell_volume 2250.791
_exptl_crystal_density_diffrn      4.167
_symmetry_space_group_name_H-M 'I 41/a c d'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,1/2+z'
  '1/4-y,3/4-x,3/4+z'
  '3/4-y,1/4-x,1/4+z'
  '1/4+y,3/4+x,3/4-z'
  '3/4+y,1/4+x,1/4-z'
  '1/4+y,3/4-x,1/4-z'
  '3/4+y,1/4-x,3/4-z'
  '1/4-y,3/4+x,1/4+z'
  '3/4-y,1/4+x,3/4+z'
  '1/2+x,-y,z'
  '+x,1/2-y,1/2+z'
  '1/2-x,y,-z'
  '-x,1/2+y,1/2-z'
  '1/2+x,y,1/2-z'
  '+x,1/2+y,-z'
  '1/2-x,-y,1/2+z'
  '-x,1/2-y,+z'
  '1/4+y,1/4+x,1/4+z'
  '3/4+y,3/4+x,3/4+z'
  '1/4-y,1/4-x,1/4-z'
  '3/4-y,3/4-x,3/4-z'
  '1/4-y,1/4+x,3/4-z'
  '3/4-y,3/4+x,1/4-z'
  '1/4+y,1/4-x,3/4+z'
  '3/4+y,3/4-x,1/4+z'
  '-x,y,1/2+z'
  '1/2-x,1/2+y,+z'
  'x,-y,1/2-z'
  '1/2+x,1/2-y,-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,1/2-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
Ba   0.25000   0.98870   0.50000
Cu   0.00000   0.25000   0.06374
Si   0.27554   0.75110   0.87600
O1   0.19160   0.72180   0.81660
O2   0.37250   0.87860   0.85939
O3   0.30750   0.78130   0.06390
loop_
_atom_site_aniso_label
_atom_site_aniso_U_11
_atom_site_aniso_U_22
_atom_site_aniso_U_33
_atom_site_aniso_U_12
_atom_site_aniso_U_13
_atom_site_aniso_U_23
Ba 0.01320 0.01200 0.01251 0.00000 -0.00180 0.00000
Cu 0.00890 0.00920 0.01230 0.00000 0.00000 0.00000
Si 0.00780 0.00690 0.01400 0.00020 -0.00700 -0.00080
O1 0.01000 0.01600 0.01700 0.00500 0.00300 0.00200
O2 0.01600 0.01500 0.03700 -0.00240 -0.00300 0.00200
O3 0.00800 0.01500 0.01900 -0.00400 0.00200 0.01200

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
5.577 Å	(31)
4.997 Å	(30)
4.560 Å	(31)
3.533 Å	(70)
2.985 Å	(100)
2.499 Å	(57)
2.280 Å	(23)
1.767 Å	(19)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
High-𝑇 alteration and/or metamorphism
31 : Thermally altered carbonate, phosphate, and iron formations
32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits

Type Occurrence of ColinowensiteHide

Type Locality:

ⓘ Wessels Mine, Joe Morolong Local Municipality, John Taolo Gaetsewe District Municipality, Northern Cape, South Africa

General Appearance of Type Material:

Subhedral crystals to 100 × 100 × 50 μm, but most do not exceed 50 μm in any direction.

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.

Associated Minerals at Type Locality:

Effenbergerite	Wesselsite	Lavinskyite	Scottyite	Diegogattaite
Pectolite	Quartz	Aegirine	Richterite	Garnet Group
Hausmannite	Hematite

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.

Download:

https://rruff.info/rruff_1.0/uploads/MM79_1769.pdf

Synonyms of ColinowensiteHide

IMA2012-060

Common AssociatesHide

Associated Minerals Based on Photo Data:

1 photo of Colinowensite associated with Effenbergerite	BaCuSi₄O₁₀
1 photo of Colinowensite associated with Scottyite	BaCu₂Si₂O₇
1 photo of Colinowensite associated with Pectolite	NaCa₂Si₃O₈(OH)
1 photo of Colinowensite associated with Braunite	Mn²⁺Mn³⁺₆(SiO₄)O₈

Fluorescence of ColinowensiteHide

In UV light:

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.

Internet Links for ColinowensiteHide

mindat.org URL:

https://www.mindat.org/min-43366.html
Please feel free to link to this page.

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External Links:

Look for Colinowensite on Webmineral

Look for Colinowensite on Wikipedia

Look for Colinowensite on Mineralien Atlas

Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

Mineral Dealers:

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References for ColinowensiteHide

Reference List:

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.

Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2013) IMA Commission on New Minerals, Nomenclature and Classification. CNMNC Newsletter No. 15. Mineralogical Magazine, 77 (1) 1-12 doi:10.1180/minmag.2013.077.1.01

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.

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.

(2023) Colinowensite. Handbook of Mineralogy. Mineralogical Society of America

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 references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

South Africa (TL)

Northern Cape

John Taolo Gaetsewe District Municipality

Joe Morolong Local Municipality

ⓘ Wessels Mine (TL)

Williams et al. (2013) +1 other reference