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UM1991-08-O:Ti

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Formula:
TiO2
Crystal System:
Monoclinic
A TiO2 polymorph found as lamellae within Alpine anatase. Corresponds to the synthetic TiO2 (B) polymorph.

Space group differs from that of the other monoclinic polymorphs, akaogiite and riesite.


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Classification of UM1991-08-O:TiHide

Notes:
Unnamed (probably valid)

Chemical Properties of UM1991-08-O:TiHide

Formula:
TiO2

Crystallography of UM1991-08-O:TiHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 12.16 Å, b = 3.47 Å, c = 6.51 Å
β = 107.29°
Ratio:
a:b:c = 3.504 : 1 : 1.876
Unit Cell V:
262.28 ų (Calculated from Unit Cell)
Comment:
data for the SYNTHETIC material

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.2Å(
5.8Å(
5.1Å(
3.7Å(
3.3Å(
3.2Å(
3.2Å(
3.1Å(
3.0Å(
3.0Å(
2.9Å(
2.7Å(
2.6Å(
2.6Å(
2.5Å(
2.5Å(
2.4Å(
2.3Å(
2.2Å(
2.2Å(
2.1Å(
2.0Å(
2.0Å(
2.0Å(
Comments:
d info from SAED, measured

Other InformationHide

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 UM1991-08-O:TiHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Banfield, J.F., Veblen, D.R., Smith, D.J. (1991): The identification of naturally occurring TiO2 (B) by structure determination using high resolution electron microscopy, image simulation, and distance-least-squares refinement. American Mineralogist: 76: 343-353
Smith, D.G.W., Nickel, E.H. (2007): A System of Codification for Unnamed Minerals: Report of the SubCommittee for Unnamed Minerals of the IMA Commission on New Minerals, Nomenclature and Classification. Canadian Mineralogist: 45: 983-1055; http://nrmima.nrm.se (2016)

Internet Links for UM1991-08-O:TiHide

Localities for UM1991-08-O:TiHide

ⓘ - 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.
Switzerland
 
  • Valais
Banfield, J.F., Veblen, D.R., Smith, D.J. (1991): The identification of naturally occurring TiO2 (B) by structure determination using high resolution electron microscopy, image simulation, and distance-least-squares refinement. American Mineralogist: 76: 343-353
 
Mineral and/or Locality  
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