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Strontioborite

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Formula:
SrB8O11(OH)4
System:
Monoclinic
Colour:
Colourless
Name:
The name reflects its composition : a strontium borate.
Originally reported from Chelkar salt dome, Aksai Valley, Aqtöbe Oblysy (Aktubinsk [Aktyubinsk; Aktubinskaya] Oblast'), Kazakhstan.

Classification of Strontioborite

Discredited
6.FC.10

6 : BORATES
F : Hexaborates
C : Phyllo-hexaborates
25.6.3.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
6 : Hexaborates
9.3.26

9 : Borates
3 : Borates of Ca and Sr
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Physical Properties of Strontioborite

Diaphaneity (Transparency):
Transparent
Colour:
Colourless
Tenacity:
Very brittle

Crystallography of Strontioborite

Crystal System:
Monoclinic
Cell Parameters:
a = 9.83Å, b = 8.22Å, c = 7.55Å
β = 107.77°
Ratio:
a:b:c = 1.196 : 1 : 0.918
Unit Cell Volume:
V 580.95 ų (Calculated from Unit Cell)

Optical Data of Strontioborite

Type:
Biaxial (+/-)
RI values:
nα = 1.470 nβ = 1.510 nγ = 1.579
2V:
Measured: 85° , Calculated: 78°
Max Birefringence:
δ = 0.109
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 Strontioborite

Formula:
SrB8O11(OH)4
Essential elements:
All elements listed in formula:

Relationship of Strontioborite to other Species

6.FC.05TunelliteSrB6O9(OH)2 · 3H2O
6.FC.05NobleiteCaB6O9(OH)2 · 3H2O
6.FC.15GinoriteCa2B14O23 · 8H2O
6.FC.15Strontioginorite(Sr,Ca)2B14O23 · 8H2O
6.FC.20FabianiteCaB3O5OH
9.3.1CalciboriteCa(B2O4)
9.3.2SibirskiteCa2(HB2O5)(OH)
9.3.3FabianiteCaB3O5OH
9.3.4UralboriteCa2[B3O3(OH)5 · OB(OH)3]
9.3.5VimsiteCaB2O2(OH)4
9.3.6OlshanskyiteCa3[B(OH)4]4(OH)2
9.3.7FroloviteCa[B(OH)4]2
9.3.8KorzhinskiteCa(B2O4) · H2O
9.3.9TyretskiteCa2B5O9OH · H2O
9.3.10NifontoviteCa3B6O6(OH)12(H2O)2
9.3.12InyoiteCa(H4B3O7)(OH) · 4H2O
9.3.13GoweriteCa[B5O8(OH)][B(OH)3] · 3H2O
9.3.14ColemaniteCa[B3O4(OH)3] · H2O
9.3.15PentahydroboriteCaB2O(OH)6 · 2H2O
9.3.16HexahydroboriteCa[B(OH)4]2 · 6H2O
9.3.17MeyerhofferiteCa2(H3B3O7)2 · 4H2O
9.3.18PriceiteCa2B5O7(OH)5 · H2O
9.3.19GinoriteCa2B14O23 · 8H2O
9.3.20ProbertiteNaCaB5O7(OH)4 · 3H2O
9.3.21UlexiteNaCa[B5O6(OH)6] · 5H2O
9.3.22HydroboraciteCaMg[B3O4(OH)3]2 · 3H2O
9.3.23InderboriteCaMg(H3B3O7)2 · 8H2O
9.3.24WardsmithiteCa5Mg[B4O7]6 · 30H2O
9.3.25HenmiliteCa2Cu[B(OH)4]2(OH)4
9.3.27VeatchiteSr2B11O16(OH)5 · H2O
9.3.28Veatchite-ASr2B11O16(OH)5 · H2O
9.3.29 P-Veatchite
9.3.30 BalavinskiteSr2B6O11 · 4H2O
9.3.31TunelliteSrB6O9(OH)2 · 3H2O
9.3.32Strontioginorite(Sr,Ca)2B14O23 · 8H2O

Other Names for Strontioborite

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 Strontioborite

Reference List:
Doklady Akademii Nauk SSSR (1960): 135: 173.

American Mineralogist (1961): 46: 768.

American Mineralogist (1965): 50: 1508.

Soviet Physics – Crystallography: 20: 563-566.

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

Internet Links for Strontioborite

Localities for Strontioborite

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.
Kazakhstan
 
  • Aktobe Province (Aqtöbe Oblysy; Aktubinskaya Oblast')
    • Aksai Valley
Handbook of Mineralogy Vol V p 6; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
Mineral and/or Locality  
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