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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
Name:To honor Vannoccio Biringuccio (1480–1538/9), Italian alchemist, metallurgist, politician, mine manager and foundryman; author of the Pirotechnia, his manual on metalworking, published in 1540. He is considered by some as the father of the foundry industry as De la pirotechnia is the first written account of proper foundry practice. He was in charge of casting cannons for Venice and later Florence. In 1536, he was offered a position in Rome by the Catholic Church, and in 1538 he became head of the papal foundry, and director of munitions. He was a Senator of the city of Siena in January and February of 1531.
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
 
5
)(OH)
 
4
 · 8H
 
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
  • Biringuccite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
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    • Localities for Biringuccite

    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.
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    (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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