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Schreyerite

A valid IMA mineral species

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Photos of Schreyerite (4)Discuss Schreyerite

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Schreyerite

Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden

Schreyerite, etc.

Bisbee, Cochise County, Arizona, USA

Schreyerite, etc.

Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden

Schreyerite

Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden

Schreyerite, etc.

Bisbee, Cochise County, Arizona, USA

Schreyerite, etc.

Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden

Schreyerite

Sätra Mine, Doverstorp ore field, Finspång, Östergötland County, Sweden

Schreyerite, etc.

Bisbee, Cochise County, Arizona, USA

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About SchreyeriteHide

Werner Schreyer

Formula:

V³⁺₂Ti⁴⁺₃O₉

Colour:

Reddish brown

Lustre:

Metallic

Hardness:

Specific Gravity:

4.46 (Calculated)

Crystal System:

Monoclinic

Name:

For German mineralogist, Werner Schreyer (November 14 1930, Nürnberg - February 12 2006, Bochum). He was a professor at Ruhr University Bochum from 1966-1996. He was awarded the Abraham-Gottlob-Werner Medal (German Mineralogical Society) in 1991 and the Roebling Medal (Mineralogical Society of America) in 2002. He made significant mineralogical and petrological contributions on kornerupine- and sapphirine-bearing rocks.

Type Locality:

ⓘ Lasamba Hill, Kwale County, Kenya

The V analogue of machiite. Chemically, but not structurally, the V analogue of pseudorutile.

Unique IdentifiersHide

Mindat ID:

3583

Long-form identifier:

mindat:1:1:3583:1

IMA Classification of SchreyeriteHide

IMA status:

Approved

Approval year:

1976

First published:

1976

Type description reference:

Medenbach, O., Schmetzer, K. (1976) Schreyerit (V2Ti3O9), ein neues Vanadium-Mineral aus Kenya. Die Naturwissenschaften, 63 (6). 293-294 doi:10.1007/bf00624019

Classification of SchreyeriteHide

Strunz-mindat (2026):

4.CB.35

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
C : Metal: Oxygen = 2: 3,3: 5, and similar
B : With medium-sized cations

Dana 8th ed.:

8.4.1.1

8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
4 : A₂B₃O₉

Hey's CIM Ref.:

7.12.14

7 : Oxides and Hydroxides
12 : Oxides of V, Nb and Ta

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 for Standard
Sry	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 SchreyeriteHide

Lustre:

Metallic

Transparency:

Opaque

Colour:

Reddish brown

Hardness:

7 on Mohs scale

Hardness:

VHN₁₀₀=1100 - 1200 - Vickers

Density:

4.46 g/cm³ (Calculated)

Optical Data of SchreyeriteHide

Type:

Biaxial

RI values:

n_α = 2.7

Surface Relief:

Unknown

Anisotropism:

Moderate

Bireflectance:

White to brownish

Dispersion:

relatively strong

Colour in reflected light:

Gray

Internal Reflections:

None

Pleochroism:

Weak

Comments:

yellow-brown to reddish brown.

Comments:

The mean value of reflectivity for 546 nm (Na light) is 21%.

Chemistry of SchreyeriteHide

Mindat Formula:

V³⁺₂Ti⁴⁺₃O₉

Element Weights:

Element	% weight
O	36.971 %
Ti	36.870 %
V	26.159 %

Calculated from ideal end-member formula.

Elements listed:

O, Ti, V - search for minerals with similar chemistry

Crystallography of SchreyeriteHide

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Space Group:

B2/b

Setting:

C2/c

Cell Parameters:

a = 17.102(2) Å, b = 5.0253(5) Å, c = 7.0579(8) Å
β = 106.636(10)°

Ratio:

a:b:c = 3.403 : 1 : 1.404

Unit Cell V:

581.19 Å³ (Calculated from Unit Cell)

Morphology:

Occurs in intergrowth with rutile.

Twinning:

Very fine polysynthetic twinning.

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)
0004005	Schreyerite	Dobelin N, Reznitsky L Z, Sklyarov E V, Armbruster T, Medenbach O (2006) Schreyerite, V2Ti3O9: New occurrence and crystal structure American Mineralogist 91 196-202		2006	Sludyanka complex at the southern shore of Lake Baikal, Russia	0	293

CIF Raw Data - click here to close

data_global
_chemical_name_mineral 'Schreyerite'
loop_
_publ_author_name
'Dobelin N'
'Reznitsky L Z'
'Sklyarov E V'
'Armbruster T'
'Medenbach O'
_journal_name_full 'American Mineralogist'
_journal_volume 91 
_journal_year 2006
_journal_page_first 196
_journal_page_last 202
_publ_section_title
;
 Schreyerite, V2Ti3O9: New occurrence and crystal structure
;
_database_code_amcsd 0004005
_chemical_compound_source 'Sludyanka complex at the southern shore of Lake Baikal, Russia'
_chemical_formula_sum 'V2.254 Cr.158 Fe.036 Ti2.535 O9'
_cell_length_a 17.102
_cell_length_b 5.0253
_cell_length_c 7.0579
_cell_angle_alpha 90
_cell_angle_beta 106.636
_cell_angle_gamma 90
_cell_volume 581.185
_exptl_crystal_density_diffrn      4.462
_symmetry_space_group_name_H-M 'C 1 2/c 1'
loop_
_space_group_symop_operation_xyz
  'x,y,z'
  '1/2+x,1/2+y,z'
  'x,-y,1/2+z'
  '1/2+x,1/2-y,1/2+z'
  '-x,y,1/2-z'
  '1/2-x,1/2+y,1/2-z'
  '-x,-y,-z'
  '1/2-x,1/2-y,-z'
loop_
_atom_site_label
_atom_site_fract_x
_atom_site_fract_y
_atom_site_fract_z
_atom_site_occupancy
_atom_site_U_iso_or_equiv
V3  -0.07555  -0.50100   0.10036   0.89300   0.00775
Cr3  -0.07555  -0.50100   0.10036   0.07900   0.00775
Fe3  -0.07555  -0.50100   0.10036   0.01800   0.00775
Ti1   0.00000   0.00000   0.00000   0.84500   0.00295
V1   0.00000   0.00000   0.00000   0.15600   0.00295
Ti2  -0.21608   0.00670  -0.07227   0.84500   0.00709
V2  -0.21608   0.00670  -0.07227   0.15600   0.00709
O1  -0.10850   0.15850  -0.02030   1.00000   0.00595
O2  -0.17420  -0.33160   0.07310   1.00000   0.00633
O3  -0.04740  -0.34630  -0.13000   1.00000   0.00507
O4  -0.22620  -0.16790  -0.31900   1.00000   0.00659
O5   0.00000   0.19650  -0.25000   1.00000   0.00469
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
V3 0.01010 0.00680 0.00530 -0.00110 0.00050 0.00030
Cr3 0.01010 0.00680 0.00530 -0.00110 0.00050 0.00030
Fe3 0.01010 0.00680 0.00530 -0.00110 0.00050 0.00030
Ti1 0.00350 0.00210 0.00320 0.00030 0.00090 0.00000
V1 0.00350 0.00210 0.00320 0.00030 0.00090 0.00000
Ti2 0.00720 0.00580 0.00740 0.00070 0.00070 -0.00110
V2 0.00720 0.00580 0.00740 0.00070 0.00070 -0.00110
O1 0.00400 0.00490 0.00890 -0.00050 0.00170 -0.00080
O2 0.00550 0.00510 0.00910 0.00050 0.00340 0.00040
O3 0.00610 0.00410 0.00510 -0.00040 0.00160 -0.00060
O4 0.00810 0.00630 0.00580 -0.00160 0.00250 -0.00050
O5 0.00700 0.00300 0.00390 0.00000 0.00180 0.00000

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.737 Å	(vs)
2.874 Å	(s)
4.075 Å	(m)
3.381 Å	(m)
2.432 Å	(w)
2.518 Å	(vvw)
2.310 Å	(vvw)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Stage 5: Initiation of plate tectonics	<3.5-2.5
40 : Regional metamorphism (greenschist, amphibolite, granulite facies)

Type Occurrence of SchreyeriteHide

Type Locality:

ⓘ Lasamba Hill, Kwale County, Kenya

Place of Conservation of Type Material:

University of Heidelberg, Heidelberg, Germany; National Museum of Natural History, Washington, D.C., USA, 136230.

Geological Setting of Type Material:

Intergrowths with rutile in highly metamorphosed gneiss.

Associated Minerals at Type Locality:

Biotite	Chalcopyrite	Diopside	Epidote	Graphite
Kornerupine	Pentlandite	Pyrrhotite	Quartz	Rutile
Tourmaline

Reference:

Medenbach, O., Schmetzer, K. (1976) Schreyerit (V2Ti3O9), ein neues Vanadium-Mineral aus Kenya. Die Naturwissenschaften, 63 (6). 293-294 doi:10.1007/bf00624019

Synonyms of SchreyeriteHide

IMA1976-004

Other Language Names for SchreyeriteHide

Dutch:Schreyeriet

German:Schreyerit

Russian:Шрейерит

Simplified Chinese:钒钛矿

Spanish:Schreyerita

Common AssociatesHide

Associations Based on Photo Data:

6 photos of Schreyerite associated with Chalcopyrite	CuFeS₂
4 photos of Schreyerite associated with Nekrasovite	Cu₂₆V₂(Sn,As,Sb)₆S₃₂
4 photos of Schreyerite associated with Colusite	Cu₁₃VAs₃S₁₆
4 photos of Schreyerite associated with Pyrite	FeS₂