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Biringuccite

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Formula:
Na2B5O8(OH) · H2O
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

Approved
6.EC.05

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
26.5.7.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
9.1.4

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

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°
Max Birefringence:
δ = 0.061
Image 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:
Na2B5O8(OH) · H2O
Essential elements:
All elements listed in formula:

Relationship of Biringuccite to other Species

6.EC.05NasiniteNa4B10O17 · 5H2O
6.EC.10GoweriteCa[B5O8(OH)][B(OH)3] · 3H2O
6.EC.15P-Veatchite
6.EC.15VeatchiteSr2B11O16(OH)5 · H2O
6.EC.20VolkovskiteKCa4[B5O8OH]4[B(OH)3]2Cl · 4H2O
6.EC.25TuzlaiteNaCaB5O8(OH)2 · 3H2O
6.EC.30HeidorniteNa2Ca3B5O8(SO4)2Cl(OH)2
6.EC.35BrianroulstoniteCa3[B5O6(OH)6](OH)Cl2 · 8H2O
9.1.1SassoliteH3BO3
9.1.2MetaboriteHBO2
9.1.3DiomigniteLi2[B4O7]
9.1.5NasiniteNa4B10O17 · 5H2O
9.1.6KerniteNa2[B4O6(OH)2] · 3H2O
9.1.7EzcurriteNa4B10O17 · 7H2O
9.1.8TincalconiteNa2(B4O7) · 5H2O
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2O
9.1.10AmeghiniteNa(H4B3O7)
9.1.11SborgiteNa[B5O6(OH)4] · 3H2O
9.1.12AristarainiteNa2MgB12O20 · 8H2O
9.1.13SantiteK[B5O6(OH)4] · 2H2O
9.1.14Larderellite(NH4)B5O7(OH)2 · H2O
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2O
9.1.16Rhodizite(K,Cs)Al4Be4(B,Be)12O28

Other Names for Biringuccite

Name in Other Languages:

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.

References for Biringuccite

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

American Mineralogist: 59: 1005-1015.

Internet Links for Biringuccite

Localities for Biringuccite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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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