Trebiskyite
A valid IMA mineral species
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About Trebiskyite
Tom Trebisky
Formula:
Na3Mg2[TiV9O28] · 22H2O
Colour:
translucent yellow
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.38
Crystal System:
Monoclinic
Member of:
Name:
Named in honor of Mr. Tom Trebisky, (1952- ) American mineral collector/micromounter, of Tucson, Arizona, who collected type material.
Type Locality:
New structure type. Unique combination of elements. First natural approved titanovanadate.
Unique Identifiers
Mindat ID:
54641
Long-form identifier:
mindat:1:1:54641:0
Classification of Trebiskyite
The Decavanadate Cluster
The decavanadate cluster topology found in trebiskyite. In trebiskyite, one of the vanadium atoms is replaced by a titanium atom. A similar (but Ti-free) cluster is known in a number of other secondary vanadium minerals including, for example, schindlerite, pascoite, and huemulite.
IMA Classification of Trebiskyite
Approved
Approval year:
2020
Type description reference:
4.HG.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
G : Unclassified V oxides
Mineral Symbols
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 |
|---|---|---|
| Tbk | 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 Trebiskyite
Vitreous
Transparency:
Translucent
Colour:
Translucent yellow
Streak:
Pale-yellow
Hardness:
2 on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven
Density:
2.38(2) g/cm3 (Measured) 2.352 g/cm3 (Calculated)
Chemistry of Trebiskyite
Mindat Formula:
Na3Mg2[TiV9O28] · 22H2O
Element Weights:
Crystallography of Trebiskyite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 9.478(4) Å, b = 21.426(11) Å, c = 11.267(5) Å
β = 114.572(7)°
β = 114.572(7)°
Ratio:
a:b:c = 0.442 : 1 : 0.526
Unit Cell V:
2,080.85 ų (Calculated from Unit Cell)
Z:
2
Twinning:
none
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 0.73 Å | (87) |
| 9.24 Å | (100) |
| 8.52 Å | (78) |
| 7.99 Å | (52) |
| 3.294 Å | (18) |
| 3.056 Å | (26) |
| 2.855 Å | (18) |
| 2.752 Å | (23) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Trebiskyite
General Appearance of Type Material:
thin prisms or needles up to ∼0.3 mm in length, occurring as individuals and in divergent sprays
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue numbers 74521, 74522, 74523 and 74524
Synonyms of Trebiskyite
Other Language Names for Trebiskyite
Dutch:Trebiskyiet
German:Trebiskyit
Relationship of Trebiskyite to other Species
Member of:
Other Members of Pascoite Family:
| Bluestreakite | K4Mg2(V4+2V5+8O28) · 14H2O | Mon. 2/m |
| Burroite | Ca2(NH4)2(V10O28) · 15H2O | Tric. 1 : P1 |
| Caseyite | [(V5+O2)Al10-x(OH)20-2x(H2O)18-2x]2[H2V4+V5+9O28][V5+10O28]2(Na,K,Ca)2-y(SO4)2-z · (60+8x+y+4z)H2O (x = 0-2.5; y = 0-2; z = 0-2) | Mon. |
| Gunterite | Na4Ca(V10O28) · 20H2O | Mon. 2/m : B2/m |
| Hughesite | Na3Al(V10O28) · 22H2O | Tric. 1 : P1 |
| Kokinosite | Na2Ca2(V10O28) · 24H2O | Tric. 1 : P1 |
| Lasalite Group | ||
| Nashite | Na3Ca2[(V5+9V4+)O28] · 24H2O | Mon. 2/m : P21/m |
| Okieite | Mg3[V10O28] · 28H2O | Tric. 1 : P1 |
| Pascoite Group | A group of monoclinic or triclinic, hydrated soro-vanadates with a decavanadate (V^10O^28)#6-# anion. | |
| Postite | Mg(H2O)6Al2(OH)2(H2O)8(V10O28) · 13H2O | Orth. mmm (2/m 2/m 2/m) : Pccn |
| Protocaseyite | [Al4(OH)6(H2O)12][V10O28] · 8H2O | Tric. 1 : P1 |
| Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} | Tric. 1 : P1 |
| Wernerbaurite | {(NH4)2[Ca2(H2O)14](H2O)2}{V10O28} | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
| 1 photo of Trebiskyite associated with Dickthomssenite | Mg(V2O6) · 7H2O |
| 1 photo of Trebiskyite associated with Corvusite | (Na,K,Ca,Mg)2(V5+,V4+,Fe2+)8O20 · 6-10H2O |
| 1 photo of Trebiskyite associated with Montroseite | (V3+,Fe3+)O(OH) |
| 1 photo of Trebiskyite associated with 'Sandstone' |
Related Minerals - Strunz-mindat Grouping
| 4.HG. | Calciodelrioite | Ca(VO3)2 · 4H2O |
| 4.HG. | Cadvanite | Cd(VO3)2 |
| 4.HG.05 | Fervanite | Fe3+4V5+4O16 · 5H2O |
| 4.HG.10 | Huemulite | Na4Mg(V10O28) · 24H2O |
| 4.HG.15 | Vanalite | NaAl9V12O42(OH)4 · 33H2O |
| 4.HG.20 | Simplotite | CaV4+4O9 · 5H2O |
| 4.HG.25 | Vanoxite | V4+4V5+2O13 · 8H2O |
| 4.HG.30 | Navajoite | Fe3+V5+9O24 · 12H2O |
| 4.HG.35 | Delrioite | Sr(VO3)2 · 4H2O |
| 4.HG.40 | Metadelrioite | CaSr(V2O6)(OH)2 |
| 4.HG.45 | Barnesite | (Na,Ca)V6O16 · 3H2O |
| 4.HG.50 | Hendersonite | (Ca,Sr)1.3V6O16 · 6H2O |
| 4.HG.55 | Grantsite | (Na,Ca)2+x(V5+,V4+)6O16 · 4H2O |
| 4.HG.60 | Lenoblite | V4+2O4 · 2H2O |
| 4.HG.65 | Satpaevite | Al12V4+2V5+6O37 · 30H2O |
| 4.HG.70 | Pandoraite-Ba | BaV4+5V5+2O16 · 3H2O |
| 4.HG.70 | Pandoraite-Ca | CaV4+5V5+2O16 · 3H2O |
Fluorescence of Trebiskyite
none fluorescent
Other Information
Notes:
the mineral is readily soluble in H2O.
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 Trebiskyite
mindat.org URL:
https://www.mindat.org/min-54641.html
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References for Trebiskyite
Localities for Trebiskyite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
USA (TL) | |
| Miyawaki et al. (2020) +1 other reference |
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Pickett Corral Mine, Montrose County, Colorado, USA