Calciborite
A valid IMA mineral species - grandfathered
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About Calciborite
Formula:
Ca(B2O4)
Colour:
Colorless to white
Hardness:
3½
Specific Gravity:
2.878
Crystal System:
Orthorhombic
Name:
The name alludes to the composition, containing CALCIum and BORon.
Unique Identifiers
Mindat ID:
854
Long-form identifier:
mindat:1:1:854:9
GUID
(UUID V4):
(UUID V4):
d4facc32-ebf9-4f9b-ab5c-bcd925fce6c6
IMA Classification of Calciborite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
CaB2O4
Classification of Calciborite
6.BC.10
6 : BORATES
B : Diborates
C : Ino-diborates with triangles and/or tetrahedra
6 : BORATES
B : Diborates
C : Ino-diborates with triangles and/or tetrahedra
24.5.2.1
24 : ANHYDROUS BORATES
5 : Miscellaneous
24 : ANHYDROUS BORATES
5 : Miscellaneous
9.3.1
9 : Borates
3 : Borates of Ca and Sr
9 : Borates
3 : Borates of Ca and Sr
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Cbo | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Calciborite
Transparency:
Transparent, Translucent
Colour:
Colorless to white
Hardness:
3½ on Mohs scale
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.878 g/cm3 (Measured) 2.88 g/cm3 (Calculated)
Optical Data of Calciborite
Type:
Biaxial (-)
RI values:
nα = 1.595 nβ = 1.654 nγ = 1.670
2V:
Measured: 54° , Calculated: 52°
Max Birefringence:
δ = 0.075
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r > v or r < v
Chemistry of Calciborite
Mindat Formula:
Ca(B2O4)
Elements listed:
Crystallography of Calciborite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pccn
Setting:
Pccn
Cell Parameters:
a = 8.38 Å, b = 13.82 Å, c = 5.00 Å
Ratio:
a:b:c = 0.606 : 1 : 0.362
Unit Cell V:
579.06 ų (Calculated from Unit Cell)
Z:
8
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0012450 | Calciborite | Shashkin D N, Simonov M A, Belov N V (1970) Crystal structure of calciborite CaB2O4=Ca2[BO3BO]2 Doklady Akademii Nauk SSSR 195 345-348 | 1970 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.44 Å | (10) |
3.57 Å | (8) |
1.976 Å | (7) |
1.870 Å | (7) |
1.793 Å | (7) |
7.10 Å | (6) |
3.81 Å | (6) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-𝑇 alteration and/or metamorphism | |
31 : Thermally altered carbonate, phosphate, and iron formations |
Type Occurrence of Calciborite
General Appearance of Type Material:
Prismatic crystals, to 1.5 cm
Place of Conservation of Type Material:
St. Petersburg Mining Institute, St. Petersburg, 1297/1; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 64943.
Geological Setting of Type Material:
a contact metasomatized limestone near a quartz diorite
intrusion associated with a copper deposit in skarn.
Associated Minerals at Type Locality:
Reference:
Petrova, E.S. (1955) Calciborite, a new mineral (in Russian). Geology of Mining and Chemical Raw Materials: ?: 218–223.
Other Language Names for Calciborite
Related Minerals - Strunz-mindat Grouping
6.BC.15 | Vimsite | CaB2O2(OH)4 |
6.BC.20 | Sibirskite | Ca2(HB2O5)(OH) |
6.BC.20 | Parasibirskite | Ca2(B2O5) · H2O |
6.BC.25 | Shimazakiite | Ca2B2-xO5-3x(OH)3x (x = 0~0.06) |
Other Information
Notes:
Bright green cathodoluminescence.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Calciborite
mindat.org URL:
https://www.mindat.org/min-854.html
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References for Calciborite
Localities for Calciborite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Japan | |
| |
Russia (TL) | |
|
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Novofrolovskoye B-Cu deposit, Tur'insk, Turya river, Serovsky District, Sverdlovsk Oblast, Russia