Solongoite
A valid IMA mineral species
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About Solongoite
Formula:
Ca2(H3B3O7)(OH)Cl
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
2.514
Crystal System:
Monoclinic
Member of:
Name:
Named after its discovery locality.
Unique Identifiers
Mindat ID:
3710
Long-form identifier:
mindat:1:1:3710:1
IMA Classification of Solongoite
Approved
IMA Formula:
Ca2B3O4(OH)4Cl
Approval year:
1973
First published:
1974
Classification of Solongoite
6.CA.40
6 : BORATES
C : Triborates
A : Neso-triborates
6 : BORATES
C : Triborates
A : Neso-triborates
25.3.2.1
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
3 : Triborates
10.1.11
10 : Borates with other anions
1 : Borates with halide
10 : Borates with other anions
1 : Borates with halide
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 for Standard |
|---|---|---|
| Sol | 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 Solongoite
Vitreous
Transparency:
Transparent
Colour:
Colourless
Streak:
White
Hardness:
3½ on Mohs scale
Cleavage:
Imperfect/Fair
One, imperfect, parallel elongation
One, imperfect, parallel elongation
Density:
2.514 g/cm3 (Measured) 2.58 g/cm3 (Calculated)
Optical Data of Solongoite
Type:
Biaxial (+)
RI values:
nα = 1.509 - 1.510 nβ = 1.510 - 1.511 nγ = 1.544 - 1.546
Max. Birefringence:
δ = 0.035 - 0.036
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r > v strong
Comments:
2V(meas.) = Very small.
Chemistry of Solongoite
Mindat Formula:
Ca2(H3B3O7)(OH)Cl
Element Weights:
Crystallography of Solongoite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/b
Cell Parameters:
a = 7.975(2) Å, b = 12.571(5) Å, c = 7.237(2) Å
β = 86.14(3)°
β = 86.14(3)°
Ratio:
a:b:c = 0.634 : 1 : 0.576
Unit Cell V:
723.89 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Subhedral crystals, tabular, vertically striated, to 0.2 mm
Crystal Structure
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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) |
|---|---|---|---|---|---|---|---|
| 0015575 | Solongoite | Yamnova N A, Simonov M A, Belov N V (1977) Refined crystal structure of solongoite Ca2[B3O4(OH)4]Cl Soviet Physics Crystallography 22 356-357 | 1977 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.196 Å | (10) |
| 7.84 Å | (9) |
| 1.734 Å | (9) |
| 2.61 Å | (8) |
| 2.54 Å | (8) |
| 1.911 Å | (8) |
| 2.74 Å | (7) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 23 : Subaerial aqueous alteration by non-redox-sensitive fluids (see also #47) |
Type Occurrence of Solongoite
General Appearance of Type Material:
Colorless, transparent crystals up to 0.2 mm long and 0.1 mm in diameter.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 74785.
Associated Minerals at Type Locality:
Synonyms of Solongoite
Other Language Names for Solongoite
Dutch:Solongoiet
German:Solongoit
Russian:Солонгоит
Simplified Chinese:斜氯硼钙石
Spanish:Solongoita
Traditional Chinese:斜氯硼鈣石
Relationship of Solongoite to other Species
Member of:
Other Members of Inderite Group:
| Inderborite | CaMg(H3B3O7)2 · 8H2O | Mon. 2/m : B2/b |
| Inderite | MgB3O3(OH)5 · 5H2O | Mon. 2/m : P21/b |
| Inyoite | Ca(H4B3O7)(OH) · 4H2O | Mon. 2/m : P21/b |
| Kurnakovite | MgB3O3(OH)5 · 5H2O | Tric. 1 : P1 |
| Meyerhofferite | CaB3O3(OH)5 · H2O | Tric. 1 : P1 |
Common Associates
Associations Based on Photo Data:
| 1 photo of Solongoite associated with Kurchatovite | Ca(Mg,Mn2+)[B2O5] |
| 1 photo of Solongoite associated with Ludwigite | Mg2Fe3+(BO3)O2 |
Related Minerals - Strunz-mindat Grouping
| 6.CA.10 | Ameghinite | Na(H4B3O7) |
| 6.CA.15 | Inderite | MgB3O3(OH)5 · 5H2O |
| 6.CA.20 | Kurnakovite | MgB3O3(OH)5 · 5H2O |
| 6.CA.25 | Inderborite | CaMg(H3B3O7)2 · 8H2O |
| 6.CA.30 | Meyerhofferite | CaB3O3(OH)5 · H2O |
| 6.CA.35 | Inyoite | Ca(H4B3O7)(OH) · 4H2O |
| 6.CA.45 | Peprossiite-(Ce) | CeAl2(B3.67Si0.33)O10.67 |
| 6.CA.45 | Peprossiite-(Y) | YAl2(B3.67Si0.33)O10.67 |
| 6.CA.50 | Nifontovite | Ca3B6O6(OH)12(H2O)2 |
| 6.CA.55 | Olshanskyite | Ca2[B3O3(OH)6](OH) · 3H2O |
Other Information
Notes:
Insoluble in water, readily dissolved by cold HCl or H2SO4.
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 Solongoite
mindat.org URL:
https://www.mindat.org/min-3710.html
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References for Solongoite
Localities for Solongoite
Showing 2 localities.
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
Japan | |
| - (I. Pekov analyses) |
Russia (TL) | |
| Malinko (1974) +3 other references |
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Fuka mine, Fuka, Bitchū, Takahashi City, Okayama Prefecture, Japan