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Biringuccite

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Larderello, Pomarance, Pisa Province, Tuscany, Italy
© 2007, JGW

Formula:
Na
 
2
B
 
5
O
 
8
(OH)·H
 
2
O
System:Monoclinic
This page provides mineralogical data about Biringuccite.

Classification of Biringuccite

IMA status:Approved
Strunz 8th edition ID:5/K.03-20
Nickel-Strunz 10th (pending) edition ID:6.EC.05

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
Dana 8th edition ID:26.5.7.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
Hey's CIM Ref.:9.1.4

9 : Borates
1 : Borates of the alkalis and boric acid
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Type Occurrence of Biringuccite

Type Locality:Larderello, Pomarance, Pisa Province, Tuscany, Italy
Year of Discovery:1961

Crystallography of Biringuccite

Crystal System:Monoclinic
Cell Parameters:a = 11.19Å, b = 6.56Å, c = 20.76Å
β = 93.89°
Ratio:a:b:c = 1.706 : 1 : 3.165
Unit Cell Volume:V 1,520.41 ų (Calculated from Unit Cell)

Optical Data of Biringuccite

Type:Biaxial (-)
RI values: nα = 1.496 nβ = 1.539 nγ = 1.557
2V:Measured: 62° , Calculated: 64°
Maximum Birefringence:δ = 0.061

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

Chemical Properties of Biringuccite

Formula:
Na
 
2
B
 
5
O
 
8
(OH)·H
 
2
O
Essential elements:B, H, Na, O
All elements listed in formula:B, H, Na, O

Relationship of Biringuccite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.EC.05Nasinite
Na
 
4
B
 
10
O
 
17
·5H
 
2
O
6.EC.10Gowerite
Ca[B
 
5
O
 
8
(OH)][B(OH)
 
3
]·3H
 
2
O
6.EC.15P-Veatchite
6.EC.15Veatchite
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
·H
 
2
O
6.EC.20Volkovskite
KCa
 
4
[B
 
5
O
 
8
OH]
 
4
[B(OH)
 
3
]
 
2
Cl·4H
 
2
O
6.EC.25Tuzlaite
NaCaB
 
5
O
 
8
(OH)
 
2
·3H
 
2
O
6.EC.30Heidornite
Na
 
2
Ca
 
3
B
 
5
O
 
8
(SO
 
4
)
 
2
Cl(OH)
 
2
6.EC.35Brianroulstonite
Ca
 
3
[B
 
5
O
 
6
(OH)
 
6
](OH)Cl
 
2
·8H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.1.1Sassolite
H
 
3
BO
 
3
9.1.2Metaborite
HBO
 
2
9.1.3Diomignite
Li
 
2
[B
 
4
O
 
7
]
9.1.5Nasinite
Na
 
4
B
 
10
O
 
17
·5H
 
2
O
9.1.6Kernite
Na
 
2
[B
 
4
O
 
6
(OH)
 
2
] · 3H
 
2
O
9.1.7Ezcurrite
Na
 
4
B
 
10
O
 
17
·7H
 
2
O
9.1.8Tincalconite
Na
 
2
[B
 
4
O
 
7
] · 5H
 
2
O
9.1.9Borax
Na
 
2
[B
 
4
O
 
7
] · 10H
 
2
O
9.1.10Ameghinite
Na(H
 
4
B
 
3
O
 
7
)
9.1.11Sborgite
Na[B
 
5
O
 
6
(OH)
 
4
] · 3H
 
2
O
9.1.12Aristarainite
Na
 
2
MgB
 
12
O
 
20
·8H
 
2
O
9.1.13Santite
K[B
 
5
O
 
6
(OH)
 
4
] · 2H
 
2
O
9.1.14Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
9.1.15Ammonioborite
(NH
 
4
)
 
2
[B
 
5
O
 
6
(OH)
 
4
]
 
2
 · H
 
2
O
9.1.16Rhodizite
(K,Cs)Al
 
4
Be
 
4
(B,Be)
 
12
O
 
28

Other Names for Biringuccite

Other Languages:
German:Biringuccit
Russian:Бирингучит
Spanish:Biringuccita

Other Information

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 Biringuccite

Reference List:American Mineralogist: 48: 709-711.

American Mineralogist: 59: 1005-1015.

Internet Links for Biringuccite

Search Engines:
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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Biringuccite in the Natural History Museum (London) online catalogue
  • Biringuccite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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    Localities for Biringuccite

    (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.
    Italy
     
    • Tuscany
      • Pisa Province
        • Pomarance
    		NJMA 148 (1983), 163
    Mineral and/or Locality
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