Grammatikopoulosite
A valid IMA mineral species
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Formula:
NiVP
Lustre:
Metallic
Specific Gravity:
7.085 (Calculated)
Crystal System:
Orthorhombic
Member of:
Name:
For Tassos Grammatikopoulos (b. 1966), a geoscientist at the SGS Canada Inc., for his contribution to the investigation of economic mineralogy and mineral deposits of Greece.
Structurally related to florenskyite. Unique combination of elements.
Grammatikopoulosite was discovered in a heavy mineral concentrate.
Grammatikopoulosite was discovered in a heavy mineral concentrate.
Unique Identifiers
Mindat ID:
54232
Long-form identifier:
mindat:1:1:54232:6
IMA Classification of Grammatikopoulosite
Approved
Approval year:
2019
First published:
2020
Classification of Grammatikopoulosite
1.BD.
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
D : Phosphides
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
D : Phosphides
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 |
|---|---|---|
| Gmk | 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 Grammatikopoulosite
Optical Data of Grammatikopoulosite
Anisotropism:
Slight anisotropy with indeterminate rotation tints.
Bireflectance:
Weakly bireflectant.
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 47.6% | 48.8% |
| 420nm | 47.9% | 49.1% |
| 440nm | 48.3% | 49.4% |
| 460nm | 48.6% | 49.9% |
| 470nm | 48.8% | 50.3% |
| 480nm | 49.0% | 50.7% |
| 500nm | 49.4% | 51.5% |
| 520nm | 49.9% | 52.4% |
| 540nm | 50.3% | 53.3% |
| 546nm | 50.5% | 53.5% |
| 560nm | 50.9% | 54.1% |
| 580nm | 51.4% | 54.9% |
| 589nm | 51.7% | 55.2% |
| 600nm | 51.9% | 55.5% |
| 620nm | 52.4% | 56.2% |
| 640nm | 53.0% | 56.8% |
| 650nm | 53.2% | 57.1% |
| 680nm | 53.8% | 58.0% |
| 700nm | 54.2% | 58.6% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 58.6%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Creamy-yellow
Internal Reflections:
None
Pleochroism:
Not Visible
Comments:
Measurable but not discernible pleochroism.
Chemistry of Grammatikopoulosite
Mindat Formula:
NiVP
Element Weights:
Elements listed:
Crystallography of Grammatikopoulosite
Crystal System:
Orthorhombic
Cell Parameters:
a = 5.8893(8) Å, b = 3.5723(4) Å, c = 6.8146(5) Å
Ratio:
a:b:c = 1.649 : 1 : 1.908
Unit Cell V:
143.37 ų (Calculated from Unit Cell)
Z:
4
Comment:
Pnma
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.950 Å | (20) |
| 2.785 Å | (25) |
| 2.273 Å | (60) |
| 2.157 Å | (100) |
| 2.118 Å | (25) |
| 1.784 Å | (20) |
Reference:
Comments:
Agios Stefanos mine, Greece. The data are from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 5: Initiation of plate tectonics | <3.5-2.5 |
| 38 : Ophiolites |
Type Occurrence of Grammatikopoulosite
General Appearance of Type Material:
Forms small crystals (from 5 μm up to about 80 μm) and occurs as isolated grains.
Place of Conservation of Type Material:
Holotype material is deposited in the Mineralogical Collection of the Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (Pisa, Italy), under catalogue number 19,911.
Geological Setting of Type Material:
Ophiolite complex.
Associated Minerals at Type Locality:
Synonyms of Grammatikopoulosite
Other Language Names for Grammatikopoulosite
Dutch:Grammatikopoulosiet
German:Grammatikopoulosit
Relationship of Grammatikopoulosite to other Species
Member of:
Other Members of Florenskyite Group:
| Allabogdanite | (Fe,Ni)2P | Orth. mmm(2/m2/m2/m) : Pnma |
| Andreyivanovite | FeCrP | Orth. mmm(2/m2/m2/m) : Pnma |
| Florenskyite | FeTiP | Orth. mmm(2/m2/m2/m) |
| Nickolayite | FeMoP | Orth. mmm(2/m2/m2/m) : Pnma |
Related Minerals - Strunz-mindat Grouping
| 1.BD. | Murashkoite | FeP |
| 1.BD. | Orishchinite | Ni2P |
| 1.BD. | Nickolayite | FeMoP |
| 1.BD. | Negevite | NiP2 |
| 1.BD. | Halamishite | Ni5P4 |
| 1.BD. | Transjordanite | Ni2P |
| 1.BD. | Zuktamrurite | FeP2 |
| 1.BD.05 | Nickelphosphide | (Ni,Fe)3P |
| 1.BD.05 | Schreibersite | (Fe,Ni)3P |
| 1.BD.10 | Barringerite | (Fe,Ni)2P |
| 1.BD.10 | Monipite | MoNiP |
| 1.BD.15 | Allabogdanite | (Fe,Ni)2P |
| 1.BD.15 | Florenskyite | FeTiP |
| 1.BD.15 | Andreyivanovite | FeCrP |
| 1.BD.20 | Melliniite | (Ni,Fe)4P |
| 1.BD.35 | Nazarovite | Ni12P5 |
| 1.BD.45 | Polekhovskyite | MoNiP2 |
| 1.BD.50 | Tsikourasite | Mo3Ni2P1+x |
| 1.BD.60 | Badengzhuite | TiP |
Other Information
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 Grammatikopoulosite
mindat.org URL:
https://www.mindat.org/min-54232.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Grammatikopoulosite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 53. European Journal of Mineralogy, 32 (1) 209-213 doi:10.5194/ejm-32-209-2020
Localities for Grammatikopoulosite
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.
Greece (TL) | |
| Bindi +7 other references |
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