Yakubovichite
A valid IMA mineral species
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About Yakubovichite
Formula:
CaNi2Fe3+(PO4)3
Colour:
deep yellow to lemon-yellow
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
3.657 (Calculated)
Crystal System:
Orthorhombic
Name:
Named in honor of Professor Olga Vsevolodovna Yakubovich (Ольга Всеволодовна Якубович) (born 1950), a prolific Russian crystallographer, for her contributions to the studies of inorganic phosphates.
New structure type. Chemically similar to nazarchukite. Compare moabite. Also chemically somewhat similar to crocobelonite, beershevaite and graftonite-(Ca). Another natural anhydrous Ca-Fe phosphate (but a pyrophosphate) is anastasenkoite. Compare nabateaite.
Other Ni-rich anhydrous phosphates to compare are moabite, and the pyrophosphates lisanite and shasuite.
The first mineral crystallizing in the α-CrPO4 structure type.
The assemblage (not necessarily in a direct contact with yakubovichite) includes the phosphides halamishite, nevegite, transjordanite, orishchinite, nazarovite, and polekhovskite; and also trevorite, bunsenite, and hematite-eskolaite series.
With its possible structural analogues, galileiite and xenophyllite, it could possibly constitute a new (galileiite?) group.
Other Ni-rich anhydrous phosphates to compare are moabite, and the pyrophosphates lisanite and shasuite.
The first mineral crystallizing in the α-CrPO4 structure type.
The assemblage (not necessarily in a direct contact with yakubovichite) includes the phosphides halamishite, nevegite, transjordanite, orishchinite, nazarovite, and polekhovskite; and also trevorite, bunsenite, and hematite-eskolaite series.
With its possible structural analogues, galileiite and xenophyllite, it could possibly constitute a new (galileiite?) group.
Unique Identifiers
Mindat ID:
55385
Long-form identifier:
mindat:1:1:55385:4
IMA Classification of Yakubovichite
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 |
|---|---|---|
| Ybv | 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 Yakubovichite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Deep yellow to lemon-yellow
Streak:
Yellowish-white
Hardness:
4 on Mohs scale
Cleavage:
None Observed
Density:
3.657 g/cm3 (Calculated)
Optical Data of Yakubovichite
Type:
Biaxial (-)
RI values:
nα = 1.725 - 3 nβ = 1.765 - 3 nγ = 1.775 - 3
2V:
Calculated: 38°
Max. Birefringence:
δ = 0.000 - 0.050
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Pleochroism:
Non-pleochroic
Comments:
pale- to lemon-yellow in thin sections and immersion in transmitted light
Chemistry of Yakubovichite
Mindat Formula:
CaNi2Fe3+(PO4)3
Element Weights:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Ca0.55Na0.29K0.18Ba0.04SSr0.02)?1.08(Ni1.39Mg0.26Fe3+0.24V4+0.03Cu0.01Cr0.01)?1.94(Fe3+0.90Al0.10)?1P3.02O12 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Unnamed phosphorite quarry, Daba-Siwaqa complex, Transjordan Plateau, Amman Governorate, Jordan | by electron microprobe, in wt.%; empirical formula basis: 12 O atoms pfu |
Crystallography of Yakubovichite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Imma
Setting:
Imma
Cell Parameters:
a = 10.388(1) Å, b = 13.088(1) Å, c = 6.4794(6) Å
Ratio:
a:b:c = 0.794 : 1 : 0.495
Unit Cell V:
880.93 ų (Calculated from Unit Cell)
Z:
4
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.82 Å | (44) |
| 5.51 Å | (73) |
| 5.21 Å | (32) |
| 4.214 Å | (34) |
| 3.013 Å | (31) |
| 2.772 Å | (97) |
| 2.748 Å | (100) |
| 2.599 Å | (38) |
Type Occurrence of Yakubovichite
General Appearance of Type Material:
polycrystalline segregations, up to 0.2 mm in size, comprising "equant crystal grains" (Daba-Siwaqa); smaller (10 microns) grains at Halamish Wadi
Place of Conservation of Type Material:
Collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Leninskiy Prospekt 18-2, Moscow 119071, Russia, registration number 5626/1
Geological Setting of Type Material:
diopsidic parabasalt ("paralava") with rare anorthite, calcite and hydrous Ca silicates
Associated Minerals at Type Locality:
Synonyms of Yakubovichite
Other Language Names for Yakubovichite
Dutch:Yakubovichiet
German:Yakubovichit
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 Yakubovichite
mindat.org URL:
https://www.mindat.org/min-55385.html
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References for Yakubovichite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 60. Mineralogical Magazine, 1-5 doi:10.1180/mgm.2021.30
Britvin, Sergey N., Murashko, Mikhail N., Krzhizhanovskaya, Maria G., Vapnik, Yevgeny, Vlasenko, Natalia S., Vereshchagin, Oleg S., Pankin, Dmitrii V., Zaitsev, Anatoly N., Zolotarev, Anatoly A. (2023) Yakubovichite, CaNi2Fe3+(PO4)3, a new nickel phosphate mineral of non-meteoritic origin. American Mineralogist, 108 (11) 2142-2150 doi:10.2138/am-2022-8800
Localities for Yakubovichite
Showing 3 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.
Israel | |
| Britvin et al. (2023) |
Jordan | |
| Galuskin et al. (2023) +1 other reference |
| Miyawaki et al. (2021) +2 other references |
Unnamed phosphorite quarry, Daba-Siwaqa complex, Transjordan Plateau, Amman Governorate, Jordan