Pinnoite
A valid IMA mineral species - grandfathered
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About Pinnoite
Johann F. H. Pinno
Formula:
Mg[B2O(OH)6]
Colour:
Yellow to yellow-green; yellow in transmitted light
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
2.27
Crystal System:
Tetragonal
Name:
Named in honor of Johann Friedrich Hermann Pinno (16 March 1831, Kleinkamsdorf, Prussia, German Empire - 6 September 1902, Berlin-Charlottenburg, German Empire), Chief Councillor of Mines, Halle, Germany.
Type Locality:
This page provides mineralogical data about Pinnoite.
Unique Identifiers
Mindat ID:
3217
Long-form identifier:
mindat:1:1:3217:5
Similar Names
| Painite | A valid IMA mineral species - grandfathered | CaZrAl9(BO3)O15 |
| Pinite | ||
| Ponite | A variety of Rhodochrosite | (Mn,Fe)CO3 |
IMA Classification of Pinnoite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
MgB2O(OH)6
First published:
1884
Classification of Pinnoite
6.BB.05
6 : BORATES
B : Diborates
B : Neso-diborates with double tetrahedra B2O(OH)6; 2(2T)
6 : BORATES
B : Diborates
B : Neso-diborates with double tetrahedra B2O(OH)6; 2(2T)
25.2.3.1
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
2 : Diborates
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
2 : Diborates
9.2.8
9 : Borates
2 : Borates of Be and Mg
9 : Borates
2 : Borates of Be and Mg
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 |
|---|---|---|
| Pno | 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 Pinnoite
Vitreous
Transparency:
Translucent
Colour:
Yellow to yellow-green; yellow in transmitted light
Hardness:
3½ on Mohs scale
Fracture:
Irregular/Uneven
Density:
2.27 g/cm3 (Measured) 2.29 g/cm3 (Calculated)
Optical Data of Pinnoite
Type:
Uniaxial (+)
RI values:
nω = 1.565 nε = 1.575
Max. Birefringence:
δ = 0.010
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 Pinnoite
Mindat Formula:
Mg[B2O(OH)6]
Element Weights:
Elements listed:
Crystallography of Pinnoite
Crystal System:
Tetragonal
Class (H-M):
4/m - Dipyramidal
Space Group:
P42/m
Cell Parameters:
a = 7.617 Å, c = 8.19 Å
Ratio:
a:c = 1 : 1.075
Unit Cell V:
475.17 ų (Calculated from Unit Cell)
Morphology:
Crystals short prismatic [001], rare. Commonly crystalline, fine-granular to faintly fibrous. Nodules with radiated fibrous structure and a crystalline surface.
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0009203 | Pinnoite | Paton F, MacDonald S G G (1957) The crystal structure of pinnoite Acta Crystallographica 10 653-656 |  | 1957 | Stassfurt, Germany | 0 | 293 |
| 0015585 | Pinnoite | Genkina E A, Malinovskii Y A (1983) Refinement of the structure of pinnoite: Location of hydrogen atoms Soviet Physics Crystallography 28 475-477 | 1983 | 0 | 293 | ||
| 0009314 | Pinnoite | Krogh-Moe J (1967) A note on the structure of pinnoite Acta Crystallographica 23 500-501 | | 1967 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.39 Å | (100) |
| 2.309 Å | (70) |
| 2.045 Å | (50) |
| 3.61 Å | (40) |
| 3.14 Å | (40) |
| 2.252 Å | (35) |
| 1.905 Å | (30) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Pinnoite
General Appearance of Type Material:
Nodules with a faint fibrous internal structure.
Place of Conservation of Type Material:
No designated type material.
Geological Setting of Type Material:
Upper Kainite layers of a salt deposit.
Associated Minerals at Type Locality:
Other Language Names for Pinnoite
Common Associates
Related Minerals - Strunz-mindat Grouping
| 6.BB.10 | Pentahydroborite | CaB2O(OH)6 · 2H2O |
Other Information
Notes:
Soluble in dilute acids. Dissolves in boiling water with the formation of an alkaline solution with a flocculent precipitate which re-dissolves upon cooling of the solution.
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 Pinnoite
mindat.org URL:
https://www.mindat.org/min-3217.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Pinnoite
Reference List:
Stadler, H. P. (1947) The cell dimensions and space-group of pinnoite. Mineralogical Magazine and Journal of the Mineralogical Society, 28 (196) 26-28 doi:10.1180/minmag.1947.028.196.05
Paton, F., MacDonald, S. G. G. (1957) The crystal structure of pinnoite. Acta Crystallographica, 10 (10) 653-656 doi:10.1107/s0365110x57002273
Krogh-Moe, J. (1967) A note on the structure of pinnoite. Acta Crystallographica, 23 (3) 500-501 doi:10.1107/s0365110x67003044
Strunz, Hugo (1996) Classification of borate minerals. European Journal of Mineralogy, 9 (1) 225-232 doi:10.1127/ejm/9/1/0225
Frost, Ray L., Xi, Yunfei (2014) Vibrational spectroscopy of the borate mineral pinnoite MgB2O(OH)6. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 117. 428-433 doi:10.1016/j.saa.2013.08.047
Lin, Feng, Dong, Yaping, Peng, Jiaoyu, Wang, Liping, Li, Wu (2015) Synthesis and formation mechanism of pinnoite by the phase transition process. Phase Transitions, 89 (6). 558-567 doi:10.1080/01411594.2015.1077524
Localities for Pinnoite
Showing 16 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.
Argentina | |
| Alonso (1999) |
China | |
| Kezao Chen (1992) | |
| Keqin Cai and Ziqiang Qian (1982) +5 other references |
| Dapeng Sun (1991) +4 other references | |
| Xiyu Zheng and Shengsong Yu (1981) +6 other references |
| Xifang Liu and Mianping Zheng (2010) | |
| Bingxiao (1992) |
Germany | |
| Palache et al. (1951) |
| Palache et al. (1951) | |
| Milch (1891) +1 other reference | |
| Luedecke (1891) +1 other reference | |
| ... | |
Kazakhstan | |
| - (1993) +2 other references |
| Pekov (1998) |
Russia | |
| Mazurov et al. (2007) |
USA | |
| Crowley (1996) +1 other reference |
Quick NavTopAbout PinnoiteUnique IdentifiersSimilar NamesIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence Other LanguagesCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Inder B deposit and salt dome, Inder District, Atyrau Region, Kazakhstan