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Schreyerite

Big Photo

Sätra Mine, Doverstorp ore field, Finspång, Östergötland, Sweden
© Maurice de Graaf

Formula:
V
 
2
Ti
 
3
O
 
9
System:MonoclinicColour:Black
Hardness:7
Name:For German mineralogist, Werner Schreyer (b. 1930).
This page provides mineralogical data about Schreyerite.

Classification of Schreyerite

IMA status:Approved 1976
Strunz 8th edition ID:4/C.26-20
Nickel-Strunz 10th (pending) edition ID: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 edition ID: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
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Type Occurrence of Schreyerite

Type Locality:Lasamba Hill, Kwale District, Coast Province, Kenya
Year of Discovery:1976

Physical Properties of Schreyerite

Lustre:Metallic
Colour:Black
Hardness (Mohs):7

Crystallography of Schreyerite

Crystal System:Monoclinic
Cell Parameters:a = 7.06Å, b = 5.01Å, c = 18.74Å
β = 119.4°
Ratio:a:b:c = 1.409 : 1 : 3.741
Unit Cell Volume:V 577.48 ų (Calculated from Unit Cell)

Optical Data of Schreyerite

Type:Biaxial
RI values: nα = 2.700
Maximum Birefringence:δ = 2.700

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Schreyerite

Formula:
V
 
2
Ti
 
3
O
 
9
Essential elements:O, Ti, V
All elements listed in formula:O, Ti, V

Relationship of Schreyerite to other Species

Related Minerals - Nickel-Strunz Grouping):
4.CB.05Brizziite
NaSb
5+
 
O
 
3
4.CB.05Corundum
Al
 
2
O
 
3
4.CB.05Ecandrewsite
(Zn,Fe
2+
 
,Mn
2+
 
)TiO
 
3
4.CB.05Eskolaite
Cr
 
2
O
 
3
4.CB.05Geikielite
MgTiO
 
3
4.CB.05Hematite
Fe
 
2
O
 
3
4.CB.05Ilmenite
Fe
2+
 
TiO
 
3
4.CB.05Karelianite
V
 
2
O
 
3
4.CB.05Melanostibite
Mn
2+
 
(Sb
5+
 
,Fe
3+
 
)O
 
3
4.CB.05Pyrophanite
Mn
2+
 
TiO
 
3
4.CB.05Auroantimonate
AuSbO
 
3
4.CB.05Romanite
([],Pb,Ca)UFe
2+
2
(Ti,Fe
3+
 
)
 
6
Ti
 
12
O
 
38
4.CB.10Avicennite
Tl
 
2
O
 
3
4.CB.10Bixbyite
(Mn
3+
 
,Fe
3+
 
)
 
2
O
 
3
4.CB.15Armalcolite
(Mg,Fe
2+
 
)Ti
 
2
O
 
5
4.CB.15Pseudobrookite
Fe
 
2
TiO
 
5
4.CB.15Mongshanite
(Mg,Cr,Fe
2+
 
)
 
2
(Ti,Zr)
 
5
O
 
12
4.CB.20Zincohögbomite-2N2S
Ti(Zn,Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
4.CB.20Zincohögbomite-2N6S
Ti(Zn,Mg,Fe)
 
6
Al
 
16
O
 
31
(OH)
4.CB.20Magnesiohögbomite-6N6S
Ti(Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
4.CB.20Magnesiohögbomite-2N3S
Ti(Mg,Fe)
 
3
Al
 
10
O
 
19
(OH)
4.CB.20Magnesiohögbomite-2N2S
Ti(Mg,Fe)
 
2
Al
 
8
O
 
15
(OH)
4.CB.20Ferrohögbomite-6N12S
Ti(Fe,Mg)
 
4
Al
 
12
O
 
23
(OH)
4.CB.25Pseudorutile
Fe
 
2
Ti
 
3
O
 
9
4.CB.25Tietaiyangite
Fe
3+
4
Fe
2+
 
TiO
 
9
4.CB.30Berdesinskiite
V
3+
2
TiO
 
5
4.CB.35Kyzylkumite
V
 
2
Ti
 
3
O
 
9
4.CB.35Olkhonskite
(Cr,V)
 
2
Ti
 
3
O
 
9
4.CB.40Kamiokite
Fe
 
2
Mo
 
3
O
 
8
4.CB.40Nolanite
(V,Fe,Fe,Ti)
 
10
O
 
14
(OH)
 
2
4.CB.40Rinmanite
Zn
 
2
Sb
 
2
Mg
 
2
Fe
 
4
O
 
14
(OH)
 
2
4.CB.45Claudetite
As
 
2
O
 
3
4.CB.45Stibioclaudetite
AsSbO
 
3
4.CB.50Arsenolite
As
 
2
O
 
3
4.CB.50Sénarmontite
Sb
 
2
O
 
3
4.CB.55Valentinite
Sb
 
2
O
 
3
4.CB.60Bismite
Bi
 
2
O
 
3
4.CB.65Sphaerobismoite
Bi
 
2
O
 
3
4.CB.70Sillénite
Bi
 
12
SiO
 
20
Related Minerals - Hey's Index Grouping:
7.12.1Montroseite
(V,Fe)O(OH)
7.12.2 Scherbinaite
V
 
2
O
 
5
7.12.3Paramontroseite
VO
 
2
7.12.4Häggite
V
 
2
O
 
2
(OH)
 
3
7.12.5Duttonite
VO(OH)
 
2
7.12.6Doloresite
3V
 
2
O
 
4
·4H
 
2
O
7.12.7Lenoblite
V
 
2
O
 
4
·2H
 
2
O
7.12.8Navajoite
V
 
2
O
 
5
 · 3H
 
2
O
7.12.9Vanoxite
V
 
6
O
 
13
·8H
 
2
O
7.12.10Bariandite
Al
 
3
[(V
5+
 
,V
4+
 
)
 
4
O
 
10
]
 
10
 · 45H
 
2
O
7.12.11Corvusite
V
 
7
O
 
20
·nH
 
2
O
7.12.12Simplotite
CaV
 
4
O
 
9
·5H
 
2
O
7.12.13Kyzylkumite
V
 
2
Ti
 
3
O
 
9
7.12.15Berdesinskiite
V
3+
2
TiO
 
5
7.12.16Tivanite
VTiO
 
3
(OH)
7.12.17Mannardite
Ba
 
x
Ti
 
8-2x
V
 
2x
O
 
16
·2-xH
 
2
O
7.12.18Karelianite
V
 
2
O
 
3
7.12.19Coulsonite
FeV
 
2
O
 
4
7.12.20Nolanite
(V,Fe,Fe,Ti)
 
10
O
 
14
(OH)
 
2
7.12.21Vuorelainenite
(Mn,Fe)(V,Cr)
 
2
O
 
4
7.12.22Tantite
Ta
 
2
O
 
5
7.12.23Kimrobinsonite
(Ta,Nb)(OH)
 
5-2x
(O,CO
 
3
)
 
x
 x near 1.2

Other Names for Schreyerite

Synonyms:
IMA1976-004
German names:
Schreyerit
Russian names:
Шрейерит
Spanish names:
Schreyerita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Schreyerite

Reference List:American Mineralogist (1978): 63: 1182-1186.

Neues Jahrbuch für Mineralogie, Monatshefte (1983): 110.

Dobelin, N., Reznitsky, L.Z., Sklyarov, E.V., Armbruster, Th., Medenbach, O. (2006): Schreyerite, V2Ti3O9: new occurrence and crystal structure. American Mineralogist, 91, 196-202.

Internet Links for Schreyerite

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  • Raman and XRD data at RRUFF project
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  • Schreyerite details from Handbook of Mineralogy (PDF)
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    Localities for Schreyerite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Fiji
     
    • Viti Levu
      • Tavua Gold Field
        • Vatukoula
    		16th Australian Geological Convention, Adelaide,
    Kenya
     
    • Coast Province
      • Kwale District
    		Lapis 8(4), 25 (1983)
    Russia
     
    • Eastern-Siberian Region
      • Transbaikalia (Zabaykalye)
        • Buriatia (Buryatia) Republic
          • Baikal area
    		N. Dobelin et al.: American Mineralogist 91:196-202 (2006)
        • Irkutskaya Oblast'
          • Lake Baikal area
    		[MinRec 27:304]
    Sweden
     
    • Östergötland
      • Finspång
        • Doverstorp ore field
    		No reference listed
    Mineral and/or Locality
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