Orthopinakiolite
A valid IMA mineral species
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About Orthopinakiolite
Formula:
(Mg,Mn2+)2Mn3+(BO3)O2
Colour:
Black
Lustre:
Metallic
Hardness:
6
Specific Gravity:
3.935 - 4.03
Crystal System:
Orthorhombic
Member of:
Name:
Named for being the orthorhombic dimorph of Pinakiolite, which was named from the Greek πινάκιον, a small tablet, and λίθος, stone, in allusion to the thin tabular shape of the crystals.
Dimorph of:
Unique Identifiers
Mindat ID:
3030
Long-form identifier:
mindat:1:1:3030:0
IMA Classification of Orthopinakiolite
Approved
IMA Formula:
Mg2Mn3+O2(BO3)
First published:
1960
Classification of Orthopinakiolite
6.AB.40
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.
24.2.5.1
24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
24 : ANHYDROUS BORATES
2 : A2BO2[XO3]
9.7.2
9 : Borates
7 : Borates of Mn
9 : Borates
7 : Borates of Mn
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 |
|---|---|---|
| Opki | 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 Orthopinakiolite
Metallic
Transparency:
Opaque
Colour:
Black
Hardness:
6 on Mohs scale
Density:
3.935 - 4.03 g/cm3 (Measured) 4.06 g/cm3 (Calculated)
Optical Data of Orthopinakiolite
Type:
Biaxial
Chemistry of Orthopinakiolite
Mindat Formula:
(Mg,Mn2+)2Mn3+(BO3)O2
Element Weights:
Elements listed:
Crystallography of Orthopinakiolite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Pnnm
Setting:
Pnnm
Cell Parameters:
a = 18.357(4) Å, b = 12.591(2) Å, c = 6.068(1) Å
Ratio:
a:b:c = 1.458 : 1 : 0.482
Unit Cell V:
1,402.51 ų (Calculated from Unit Cell)
Z:
16
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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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) |
|---|---|---|---|---|---|---|---|
| 0005157 | Orthopinakiolite | Takeuchi Y, Haga N, Kato T, Miura Y (1978) Orthopinakiolite, Me2.95O2[BO3]: its crystal structure and relationship to pinakiolite, Me2.90O2[BO3] The Canadian Mineralogist 16 475-485 |  | 1978 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.59 Å | (100) |
| 5.17 Å | (90) |
| 2.52 Å | (90) |
| 2.03 Å | (90) |
| 2.20 Å | (80) |
| 1.523 Å | (80) |
| 3.01 Å | (70) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-? alteration and/or metamorphism | |
| 31 : Thermally altered carbonate, phosphate, and iron formations | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 7: Great Oxidation Event | <2.4 |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47e : [Vanadates, chromates, manganates] | |
| 47h : [Near-surface oxidized, dehydrated minerals] |
Type Occurrence of Orthopinakiolite
General Appearance of Type Material:
Acicular crystals.
Place of Conservation of Type Material:
Swedish Museum of Natural History, Stockholm, Sweden, 420106.
Geological Setting of Type Material:
Metamorphosed Fe–Mn orebody.
Associated Minerals at Type Locality:
Other Language Names for Orthopinakiolite
Relationship of Orthopinakiolite to other Species
Member of:
Other Members of Orthopinakiolite Group:
| Blatterite | Sb5+3(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32 | Orth. mmm(2/m2/m2/m) : Pnnm |
| Chestermanite | Mg2(Fe3+,Mn3+,Al,Sb3+)(BO3)O2 | Orth. mmm(2/m2/m2/m) |
| Takéuchiite | (Mg,Mn2+)2(Mn3+,Fe3+)(BO3)O2 | Orth. mmm(2/m2/m2/m) : Pnnm |
Common Associates
Associations Based on Photo Data:
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 | 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.75 | Pertsevite-(OH) | Mg2(BO3)(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 Orthopinakiolite
mindat.org URL:
https://www.mindat.org/min-3030.html
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References for Orthopinakiolite
Localities for Orthopinakiolite
Showing 2 localities.
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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.
Sweden (TL) | |
| Arkiv Min.Geol. (1961) +1 other reference |
| Grensman (2003) |
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Långban Mine, Långban Ore District, Filipstad, Värmland County, Sweden