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Pinnoite

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Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Oblysy (Atyrau Oblast'), Kazakhstan
© 2004 JBS

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Formula:
Mg[B
 
2
O(OH)
 
6
]
System:TetragonalColour:Yellow to yellow-green; ...
Hardness:3½
Name:After Chief Councillor of Mines Pinno, of Halle, Germany.
This page provides mineralogical data about Pinnoite.

Classification of Pinnoite

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
Strunz 8th edition ID:5/H.04-10
Nickel-Strunz 10th (pending) edition ID:6.BB.05

6 : BORATES
B : Diborates
B : Neso-diborates with double tetrahedra B2O(OH)6; 2(2T)
Dana 8th edition ID:25.2.3.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
2 : Diborates
Hey's CIM Ref.:9.2.8

9 : Borates
2 : Borates of Be and Mg
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Type Occurrence of Pinnoite

Type Locality:Stassfurt, Stassfurt Potash deposit, Saxony-Anhalt, Germany
Year of Discovery:1884
Geological Setting of type material:Upper Kainite layers of a salt deposit.
Associated Minerals at type locality:
KainiteBoracite

Physical Properties of Pinnoite

Lustre:Vitreous
Diaphaneity (Transparency):Translucent
Colour:Yellow to yellow-green; yellow in transmitted light
Hardness (Mohs):3½
Fracture:Irregular/Uneven
Density (measured):2.27 g/cm3
Density (calculated):2.29 g/cm3

Crystallography of Pinnoite

Crystal System:Tetragonal
Class (H-M):4/m - Dipyramidal
Space Group:P42/m
Cell Parameters:a = 7.617Å, c = 8.19Å
Ratio:a:c = 1 : 1.075
Unit Cell Volume: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.

Optical Data of Pinnoite

Type:Uniaxial (+)
RI values: nω = 1.565 nε = 1.575
Maximum Birefringence:δ = 0.010

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low

Chemical Properties of Pinnoite

Formula:
Mg[B
 
2
O(OH)
 
6
]
Essential elements:B, H, Mg, O
All elements listed in formula:B, H, Mg, O

Relationship of Pinnoite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.BB.10Pentahydroborite
CaB
 
2
O(OH)
 
6
 · 2H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.2.1Hambergite
Be
 
2
[O|OH|BO
 
2
]
9.2.2Suanite
Mg
 
2
[B
 
2
O
 
5
]
9.2.3Kotoite
Mg
 
3
[BO
 
3
]
 
2
9.2.4Szaibélyite
Mg
 
2
[(OH)(B
 
2
O
 
4
(OH))]
9.2.5Preobrazhenskite
Mg
 
3
B
 
11
O
 
15
(OH)
 
9
9.2.6Aksaite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 2H
 
2
O
9.2.7Wightmanite
Mg
 
5
[O|(OH)
 
5
|BO
 
3
] · 2H
 
2
O
9.2.9Kurnakovite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
9.2.10Halurgite
Mg
 
2
[B
 
4
O
 
7
]
 
2
 · 5H
 
2
O
9.2.11Inderite
Mg(H
 
4
B
 
3
O
 
7
)(OH) · 5H
 
2
O
9.2.12Hungchaoite
Mg[B
 
4
O
 
7
] · 9H
 
2
O
9.2.13Admontite
Mg[B
 
6
O
 
7
(OH)
 
6
] · 4H
 
2
O
9.2.14Mcallisterite
Mg
 
2
[B
 
6
O
 
7
(OH)
 
6
]
 
2
 · 9H
 
2
O
9.2.15Rivadavite
Na
 
6
Mg[B
 
6
O
 
7
(OH)
 
6
]
 
4
 · 10H
 
2
O
9.2.16Kaliborite
KMg
 
2
H[B
 
6
O
 
8
(OH)
 
5
]
 
2
(H
 
2
O)
 
4
9.2.17Iquiqueite
K
 
3
Na
 
4
Mg(CrO
 
4
)B
 
24
O
 
39
(OH)·12H
 
2
O

Other Names for Pinnoite

Other Languages:
German:Pinnoit
Russian:Пинноит
Spanish:Pinnoita

Other Information

Other Information: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 Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Pinnoite

Reference List:Staute (1884) Berichte deutsche chemische Gesellschaft: 17: 1584.
Genkina, E.A. & Malinivsky, Yu.A. (1983): Krystallografiya, 28, 803-805

Luedecke (1885) Zeitschrift für Naturwissenschaften, Halle: 58: 645.

Boeke (1910) Centralblatt für Mineralogie, Geologie und Paleontologie, Stuttgart: 531.

Goldschmidt, V. (1920) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 6: 155.

Stadler (1947) Mineralogical Magazine: 28: 26.

Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 334-335.

European Journal of Mineralogy (1997): 9: 227.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Pinnoite

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    Localities for Pinnoite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    China
     
    • Qinghai (Chinghai) Province
      • Haixi Autonomous Prefecture
        • Da Qaidam (Dachaidan) Co.
    		Smith, G.I. and Medrano, M.D. (2002) in: Boron, Mineralogy, Petrology and Geochemistry, p 276 (Mineralogical Society of America).
    • Tibet Autonomous Region
      • Ngari Prefecture
        • Gê'gyai Co.
    		Zheng Xiyu (1984): Chinese Journal of Oceanology and Limnology 2(2), 218-226.
    Germany
     
    • Saxony-Anhalt
    		Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 334.
    Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 368.
      • Stassfurt Potash deposit
    		Milch, L. (1891): Über ein neues krystallisiertes Borat von Stassfurt.- Z. Kryst. 18, 478-480; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 334-335.
    Luedecke, O. (1891): Über Heintzit, ein neues Borat von Leopoldshall.- Z. Kryst. 18, 481-485; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 334, 368.
    Kazakhstan
     
    • Aqtöbe Oblysy (Aktubinsk [Aktyubinsk; Aktubinskaya] Oblast')
      • Aksai Valley
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    • Atyrau Oblysy (Atyrau Oblast')
      • Atyrau (Gur'yev)
    		World of Stones #1
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Zheleznogorsk
    		Mazurov, M.P., Grishina, S.N., Istomin, V.E., and Titov, A.T. (2007): Geology of Ore Deposits 49(4), 271-284.
    USA
     
    • California
      • Inyo Co.
        • Death Valley
    		Econ Geol (1996) 91:622-635
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 13th Nov 2009 21:50:18