Pertsevite-(OH)
A valid IMA mineral species
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About Pertsevite-(OH)
Formula:
Mg2(BO3)(OH)
Colour:
colorless or have a light brown hue
Lustre:
Vitreous
Hardness:
5½ - 6½
Specific Gravity:
3.156 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for the hydroxyl dominant pertsevite.
Unique Identifiers
Mindat ID:
7660
Long-form identifier:
mindat:1:1:7660:5
Similar Names
| Pertsevite-(F) | A valid IMA mineral species | Mg2(BO3)(F,OH) |
IMA Classification of Pertsevite-(OH)
Classification of Pertsevite-(OH)
6.AB.75
6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
6 : BORATES
A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.
25.1.6.2
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
1 : Monoborates
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 |
|---|---|---|
| Psv-OH | 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 Pertsevite-(OH)
Vitreous
Colour:
Colorless or have a light brown hue
Hardness:
5½ - 6½ on Mohs scale
Hardness:
VHN50=290 - 339 kg/mm2 - Vickers
Cleavage:
Imperfect/Fair
Fracture:
Conchoidal
Density:
3.156 g/cm3 (Calculated)
Optical Data of Pertsevite-(OH)
Type:
Biaxial
RI values:
nα = 1.611(1) nβ = 1.623(1) nγ = 1.644(1)
2V:
Measured: 55° to 65°, Calculated: 75°
Max. Birefringence:
δ = 0.033
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Chemistry of Pertsevite-(OH)
Mindat Formula:
Mg2(BO3)(OH)
Element Weights:
Elements listed:
Crystallography of Pertsevite-(OH)
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnma
Setting:
Pnma
Cell Parameters:
a = 20.494(3) Å, b = 11.890(2) Å, c = 4.5880(6) Å
Ratio:
a:b:c = 1.724 : 1 : 0.386
Unit Cell V:
1,117.97 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.748 Å | (65) |
| 2.478 Å | (41) |
| 2.417 Å | (39) |
| 2.244 Å | (88) |
| 2.237 Å | (42) |
| 1.713 Å | (100) |
| 1.710 Å | (45) |
| 1.481 Å | (50) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Pertsevite-(OH)
General Appearance of Type Material:
fractured grains up to 1 mm in size in a ludwigite-kotoite magnesian skarn
Place of Conservation of Type Material:
sample number 3755/1 (Fersman Mineralogical Museum, Moscow, collection N.N. Pertsev, author’s number B-814)
Geological Setting of Type Material:
ludwigite-kotoite magnesian skarn
Associated Minerals at Type Locality:
Synonyms of Pertsevite-(OH)
Other Language Names for Pertsevite-(OH)
Dutch:Pertseviet-(OH)
German:Pertsevit-(OH)
Common Associates
Associations Based on Photo Data:
| 2 photos of Pertsevite-(OH) associated with Kotoite | Mg3[BO3]2 |
| 2 photos of Pertsevite-(OH) associated with Ludwigite | Mg2Fe3+(BO3)O2 |
| 2 photos of Pertsevite-(OH) associated with Pertsevite-(F) | Mg2(BO3)(F,OH) |
| 1 photo of Pertsevite-(OH) associated with Szaibélyite | MgBO2(OH) |
Related Minerals - Strunz-mindat Grouping
| 6.AB. | Chubarovite | KZn2(BO3)Cl2 |
| 6.AB. | Rhabdoborite-(Mo) | Mg12Mo6+1.33O6(BO3)6F2 |
| 6.AB.05 | Hambergite | Be2(BO3)(OH) |
| 6.AB.10 | Berborite | Be2(BO3)(OH) · H2O |
| 6.AB.15 | Jeremejevite | Al6(BO3)5(F,OH)3 |
| 6.AB.20 | Yuanfuliite | Mg(Fe3+,Al)O(BO3) |
| 6.AB.20 | Warwickite | (Mg,Ti,Fe,Al)2O(BO3) |
| 6.AB.25 | Karlite | (Mg,Al)6.5(BO3)3(OH)4(◻,Cl)0.5 |
| 6.AB.30 | Marinaite | Cu2Fe3+O2(BO3) |
| 6.AB.30 | Savelievaite | Mg2Cr3+O2(BO3) |
| 6.AB.30 | Fredrikssonite | Mg2Mn3+O2(BO3) |
| 6.AB.30 | Vonsenite | Fe2+2Fe3+(BO3)O2 |
| 6.AB.30 | Ludwigite | Mg2Fe3+(BO3)O2 |
| 6.AB.30 | Azoproite | (Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2 |
| 6.AB.30 | Bonaccordite | Ni2Fe3+(BO3)O2 |
| 6.AB.35 | Folvikite | Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4 |
| 6.AB.35 | Pinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
| 6.AB.40 | Takéuchiite | (Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2 |
| 6.AB.40 | Blatterite | Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32 |
| 6.AB.40 | Orthopinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
| 6.AB.40 | Chestermanite | Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2 |
| 6.AB.45 | Aluminomagnesiohulsite | (Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2 |
| 6.AB.45 | Hulsite | Fe2+2Fe3+O2(BO3) |
| 6.AB.45 | Magnesiohulsite | Mg2Fe3+O2(BO3) |
| 6.AB.50 | Fluoborite | Mg3(BO3)(F,OH)3 |
| 6.AB.50 | Hydroxylborite | Mg3(BO3)(OH)3 |
| 6.AB.55 | Shabynite | Mg5(BO3)(OH)5(Cl,OH)2 · 4H2O |
| 6.AB.55 | Wightmanite | Mg5(BO3)O(OH)5 · 2H2O |
| 6.AB.60 | Gaudefroyite | Ca4Mn3+2-3(BO3)3(CO3)(O,OH)3 |
| 6.AB.65 | Sakhaite | Ca48Mg16(BO3)32(CO3)16 · 2(H2O,HCl) |
| 6.AB.70 | Harkerite | Ca48Mg16[AlSi4O15(OH)]4(BO3)16(CO3)16 · 2(H2O,HCl) |
| 6.AB.75 | Pertsevite-(F) | Mg2(BO3)(F,OH) |
| 6.AB.80 | Jacquesdietrichite | Cu2(H2BO3)(OH)3 |
| 6.AB.85 | Rhabdoborite-(V) | Mg12(V5+,Mo6+,W6+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x} (x < 1) |
| 6.AB.85 | Rhabdoborite-(W) | Mg12(W6+,V5+)1.5O6{[BO3]6-x[(P,As)O4]xF2-x} |
| 6.AB.85 | Painite | CaZrAl9(BO3)O15 |
| 6.AB.90 | Mengxianminite | (Ca,Na)2Sn2(Mg,Fe)3Al8[(BO3)(BeO4)O6]2 |
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 Pertsevite-(OH)
mindat.org URL:
https://www.mindat.org/min-7660.html
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References for Pertsevite-(OH)
Reference List:
Galuskina, Irina O., Kadiyski, Milen, Armbruster, Thomas, Galuskin, Evgeny V., Pertsev, Nikolai N., Dzierżanowski, Piotr, Wrzalik, Roman (2008) A new natural phase in the system Mg2SiO4Mg2BO3FMg2BO3(OH): composition, paragenesis and structure of OH-dominant pertsevite. European Journal of Mineralogy, 20 (5) 951-964 doi:10.1127/0935-1221/2008/0020-1821
Galuskina, I. O., Ottolini, L., Kadiyski, M., Armbruster, T., Galuskin, E. V., Dzierzanowski, P., Winiarski, A. (2010) Pertsevite-(OH), a new mineral in the pertsevite series, Mg2(BO3)1-x(SiO4)x(F,OH)1-x (x < 0.5), from the Snezhnoye deposit in Sakha-Yakutia Republic, Russia. American Mineralogist, 95 (7) 953-958 doi:10.2138/am.2010.3457
Localities for Pertsevite-(OH)
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.
Russia | |
| Galuskina et al. (2008) |
| Galuskina et al. (2008) +1 other reference |
USA | |
| Aleksandrov (2007) |
Quick NavTopAbout Pertsevite-(OH)Unique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Snezhnoe B ore occurrence, Izvestkovyi Stream, Titovskoe B deposit, Tas-Khayakhtakh Range, Dogdo River Basin, Polar Yakutia, Sakha, Russia