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
GUID
(UUID V4):
(UUID V4):
5d43da47-4a74-4efd-adac-5af753429091
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 |
---|---|---|
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
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Pertsevite-(OH)
Mindat Formula:
Mg2(BO3)(OH)
Elements listed:
Crystallography of Pertsevite-(OH)
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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)
Common Associates
Associated Minerals 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. | Rhabdoborite-(Mo) | Mg12Mo6+1.33O6(BO3)6F2 |
6.AB. | Chubarovite | KZn2(BO3)Cl2 |
6.AB. | Savelievaite | Mg2Cr3+O2(BO3) |
6.AB.05 | Hambergite | Be2(BO3)(OH) |
6.AB.10 | Berborite | Be2(BO3)(OH,F) · H2O |
6.AB.15 | Jeremejevite | Al6(BO3)5(F,OH)3 |
6.AB.20 | Warwickite | (Mg,Ti,Fe,Al)2O(BO3) |
6.AB.20 | Yuanfuliite | Mg(Fe3+,Al)O(BO3) |
6.AB.25 | Karlite | (Mg,Al)6.5(BO3)3(OH)4(◻,Cl)0.5 |
6.AB.30 | Azoproite | (Mg,Fe2+)2(Fe3+,Ti,Mg)(BO3)O2 |
6.AB.30 | Bonaccordite | Ni2Fe3+(BO3)O2 |
6.AB.30 | Fredrikssonite | Mg2(Mn3+,Fe3+)(BO3)O2 |
6.AB.30 | Ludwigite | Mg2Fe3+(BO3)O2 |
6.AB.30 | Vonsenite | Fe2+2Fe3+(BO3)O2 |
6.AB.30 | Marinaite | Cu2Fe3+O2(BO3) |
6.AB.35 | Pinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
6.AB.35 | Folvikite | Sb5+Mn3+(Mg,Mn2+)10O8(BO3)4 |
6.AB.40 | Blatterite | Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32 |
6.AB.40 | Chestermanite | Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2 |
6.AB.40 | Orthopinakiolite | (Mg,Mn2+)2Mn3+(BO3)O2 |
6.AB.40 | Takéuchiite | (Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2 |
6.AB.45 | Hulsite | (Fe2+,Mg)2(Fe3+,Sn)(BO3)O2 |
6.AB.45 | Magnesiohulsite | (Mg,Fe2+)2(Fe3+,Sn,Mg)(BO3)O2 |
6.AB.45 | Aluminomagnesiohulsite | (Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2 |
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 | Painite | CaZrAl9(BO3)O15 |
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.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:
Localities for Pertsevite-(OH)
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
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 IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon 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