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Zangboite
A valid IMA mineral species
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Formula:
TiFeSi2
Colour:
Steel grey
Lustre:
Metallic
Hardness:
5½
Specific Gravity:
5.09 (Calculated)
Crystal System:
Orthorhombic
Name:
Named after the Yarlong Zangbo River (also known as Yarlung Tsangpo), which flows near the type locality. It flows west-to-east through Tibet / Tibet Autonomous Region, China. It later loops back west and then heads south, becoming the Brahmaputra River, emptying in the Bay of Bengal. When leaving the Tibetan Plateau, the river forms the world's largest and deepest canyon, the Yarlung Tsangpo Grand Canyon.
The first approved natural titanium iron silicide. Compare toledoite, zhiqinite, wenjiite, kangjinlaite, UM1989-10-E:FeSiTi, 'Unnamed (Fe-Si-Ti Alloy)', 'Unnamed (Fe-Si-Ti Alloy)', 'UM1989-10-E:FeSiTi', and 'UM1989-11-E:FeSiTi'.
Unique Identifiers
Mindat ID:
35900
Long-form identifier:
mindat:1:1:35900:9
IMA Classification of Zangboite
Approved
Approval year:
2007
First published:
2009
Classification of Zangboite
1.BB.
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
B : Silicides
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
B : Silicides
1.1.33.8
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
1 : NATIVE ELEMENTS AND ALLOYS
1 : Metals, other than the Platinum Group
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 |
|---|---|---|
| Zgb | 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 Zangboite
Metallic
Transparency:
Opaque
Colour:
Steel grey
Streak:
Black
Hardness:
5½ on Mohs scale
Hardness Data:
Estimated
Comment:
Tested with a steel needle
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
5.09 g/cm3 (Calculated)
Chemistry of Zangboite
Mindat Formula:
TiFeSi2
Element Weights:
Elements listed:
Common Impurities:
Cr,Mn,Zr,Al
Crystallography of Zangboite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pbam
Setting:
Pbam
Cell Parameters:
a = 8.6053(10) Å, b = 9.5211(11) Å, c = 7.6436(9) Å
Ratio:
a:b:c = 0.904 : 1 : 0.803
Unit Cell V:
626.25 ų
Z:
12
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0006308 | Zangboite | Li G, Fang Q, Shi N, Bai W, Yang J, Xiong M, Ma Z, Rong H (2009) Zangboite, TiFeSi2, a new mineral species from Luobusha, Tibet, China, and its crystal structure The Canadian Mineralogist 47 1265-1274 |
Luobusha ophiolite, Qusum Co., Shannan Prefecture, Tibet, China