Veatchite
A valid IMA mineral species - grandfathered
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About Veatchite
Formula:
Sr2B11O16(OH)5 · H2O
Colour:
Colourless, white
Lustre:
Vitreous, Silky, Pearly
Hardness:
2
Specific Gravity:
2.58 - 2.69
Crystal System:
Monoclinic
Name:
Named in honor of John Allen Veatch (5 March 1808, Knox County, Kentucky, USA - 24 April 1870, Portland, Texas, USA), surgeon, surveyor, and scientist. He was the first person to detect boron in the mineral waters of California in 1856.
The three known polytypes of veatchite (1A, 1M, 2M) are described by Grice & Pring (2012).
The SrCa-ordered analogue is called calcioveatchite.
The SrCa-ordered analogue is called calcioveatchite.
Unique Identifiers
Mindat ID:
4166
Long-form identifier:
mindat:1:1:4166:5
Similar Names
| P-Veatchite | A synonym of 'Veatchite-1M' |
| Veatchit-2M | A synonym of 'Veatchite-2M' |
| Veatchit-A | A synonym of 'Veatchite-A' |
IMA Classification of Veatchite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
Sr2B11O16(OH)5·H2O
First published:
1938
Classification of Veatchite
6.EC.15
6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
26.5.9.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
9.3.27
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 for Standard |
|---|---|---|
| Vea | 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 Veatchite
Vitreous, Silky, Pearly
Transparency:
Transparent, Translucent
Comment:
pearly on cleavages; silky in fibrous masses
Colour:
Colourless, white
Streak:
White
Hardness:
2 on Mohs scale
Cleavage:
Perfect
On {010} perfect; on {001} imperfect.
On {010} perfect; on {001} imperfect.
Density:
2.58 - 2.69 g/cm3 (Measured) 2.59 g/cm3 (Calculated)
Optical Data of Veatchite
Type:
Biaxial (+)
RI values:
nα = 1.551 nβ = 1.553 nγ = 1.62
2V:
Measured: 37° , Calculated: 22°
Max. Birefringence:
δ = 0.069
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
r < v strong
Chemistry of Veatchite
Mindat Formula:
Sr2B11O16(OH)5 · H2O
Element Weights:
Elements listed:
Crystallography of Veatchite
Polytype:
Formula:
Crystal System:
Class (H-M)
Space Group:
Space Group Setting:
Cell Parameters:
Ratio:
Unit Cell Volume (calc):
Z:
Comment:
| Veatchite-1M | Veatchite-2M | Veatchite-A |
|---|---|---|
| Sr2B11O16(OH)5 · H2O | Sr2B11O16(OH)5 · H2O | Sr2B11O16(OH)5 · H2O |
| Monoclinic | Monoclinic | Triclinic |
| 2 - Sphenoidal | m - Domatic | 1 - Pedial |
| P21 | Bb | P1 |
| P21 | Cc | |
| a = 6.7127(4) Å, b = 20.704(1) Å, c = 6.6272(4) Å β = 119.209(1)° | a = 6.6070(3) Å, b = 11.7125(5) Å, c = 20.6848(9) Å β = 91.998(1)° | a = 6.7378(6) Å, b = 6.7387(6) Å, c = 20.982(2) Å α = 87.860(1)°, β = 82.696(12)°, γ = 60.476(1)° |
| a:b:c = 0.324 : 1 : 0.32 | a:b:c = 0.564 : 1 : 1.766 | a:b:c = 1 : 1 : 3.114 |
| V 803.93 ų (Calculated from Unit Cell) | V 1,599.71 ų (Calculated from Unit Cell) | V 821.88 ų (Calculated from Unit Cell) |
| 2 | 4 | 2 |
Crystal Structure
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Unit Cell | Unit Cell Packed
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) |
|---|---|---|---|---|---|---|---|
| 0018912 | Veatchite | Grice J D, Pring A (2012) Veatchite: structural relationships of the three polytypes American Mineralogist 97 489-495 | 2012 | Penobsquis deposit, Sussex, New Brunswick, Canada | 0 | 293 | |
| 0018911 | Veatchite | Grice J D, Pring A (2012) Veatchite: structural relationships of the three polytypes American Mineralogist 97 489-495 | 2012 | Konigshall-Hindenburg potash-salt mine, Reyershausen, Germany | 0 | 293 | |
| 0018910 | Veatchite | Grice J D, Pring A (2012) Veatchite: structural relationships of the three polytypes American Mineralogist 97 489-495 | 2012 | Emet deposit, Kutahya, Turkey | 0 | 293 | |
| 0018907 | Veatchite | Rumanova I M, Gandymov O (1971) The crystal structure of the natural strontium borate, p-veatchite, Sr2[B5O8(OH)]2*B(OH)3*H2O Soviet Physics Crystallography 16 75-81 | 1971 | Inderskii formation, Kazakh SSR | 0 | 293 | |
| 0000265 | Veatchite | Clark J R, Christ C L (1971) Veatchite: Crystal structure and correlations with p-veatchite American Mineralogist 56 1934-1954 | ![]() | 1971 | old colemanite mine, Lang, Los Angeles County, California, USA | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.5 Å | (100) |
| 3.32 Å | (35) |
| 2.600 Å | (25) |
| 3.47 Å | (20) |
| 2.865 Å | (9) |
| 5.64 Å | (6) |
| 5.12 Å | (6) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Veatchite
General Appearance of Type Material:
Cross-fiber veinlets cutting limestone and howlite and as crystals deposited on colemanite.
Place of Conservation of Type Material:
Harvard University, Cambridge, Massachusetts, 92944; National Museum of Natural History, Washington, D.C., USA, 105697.
Geological Setting of Type Material:
Limestone and borate deposit.
Associated Minerals at Type Locality:
Synonyms of Veatchite
Other Language Names for Veatchite
Common Associates
Associations Based on Photo Data:
| 24 photos of Veatchite associated with Colemanite | Ca[B3O4(OH)3] · H2O |
| 1 photo of Veatchite associated with Celestine | SrSO4 |
Related Minerals - Strunz-mindat Grouping
| 6.EC. | Calcioveatchite | SrCaB11O16(OH)5 · 5H2O |
| 6.EC.05 | Nasinite | Na2[B5O8(OH)] · 2H2O |
| 6.EC.05 | Biringuccite | Na2B5O8(OH) · H2O |
| 6.EC.10 | Gowerite | Ca[B5O8(OH)][B(OH)3] · 3H2O |
| 6.EC.15 | 'Veatchite-2M' | Sr2B11O16(OH)5 · H2O |
| 6.EC.15 | 'Veatchite-A' | Sr2B11O16(OH)5 · H2O |
| 6.EC.15 | 'Veatchite-1M' | Sr2B11O16(OH)5 · H2O |
| 6.EC.20 | Volkovskite | KCa4[B5O8OH]4[B(OH)3]2Cl · 4H2O |
| 6.EC.25 | Tuzlaite | NaCaB5O8(OH)2 · 3H2O |
| 6.EC.30 | Heidornite | Na2Ca3B5O8(SO4)2Cl(OH)2 |
| 6.EC.35 | Popugaevaite | Ca3[B5O6(OH)6]FCl2 · 8H2O |
| 6.EC.35 | Brianroulstonite | Ca3[B5O6(OH)6](OH)Cl2 · 8H2O |
Other Information
IR Spectrum:
Inder material [cm-1]: 3440, 3340, 3280sh, 3230sh, 3105, 1650w, 1490, 1435sh, 1372s, 1265s, 1102s, 1071s, 992s, 962, 936s, 857, 823s, 769, 703, 677w, 641w, 631, 606, 570w, 489w, 478w, 460w
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 Veatchite
mindat.org URL:
https://www.mindat.org/min-4166.html
Please feel free to link to this page.
Please feel free to link to this page.
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Mineral Dealers:
References for Veatchite
Reference List:
Switzer, George (1938) Veatchite, a new calcium borate from Lang, California. American Mineralogist, 23 (6) 409-411
Switzer, George, Brannock, W. W. (1950) Composition of veatchite. American Mineralogist, 35 (1-2) 90-92
Kramer, Henry, Allen, Robert D. (1956) A restudy of bakerite, priceite, and veatchite. American Mineralogist, 41 (9-10) 689-700
Clark, J. R., Mrose, M. E., Perloff, A., Burley, G. (1959) Studies of borate minerals. (VI); Investigation of Veatchite. American Mineralogist, 44 (11-12) 1141-1149
Clark, J. R., Mrose, M. E. (1960) Veatchite and ρ-veatchite. American Mineralogist, 45 (11-12) 1221-1229
Clark, Joan R., Christ, C. L. (1971) Veatchite: Crystal structure and correlations to p-veatchite. American Mineralogist, 56 (11-12) 1934-1954
Localities for Veatchite
Showing 25 localities.
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.
Canada | |
| Grice et al. (2005) |
| Grice (2002) | |
Germany | |
| [Veatchite-1M] Braitsch (1969) |
| [Veatchite-1M] Siemroth (2008) |
Kazakhstan | |
| Pekov et al. (1993) +1 other reference |
| Tony Nikischer specimen and analysis +1 other reference |
| Pekov et al. (2024) |
Mexico | |
| Miranda-Gasca et al. (1998) +1 other reference |
Russia | |
| [Veatchite-1M] Pekov et al. (2024) |
Serbia | |
| Malinko et al. (2004) |
Turkey | |
| [Veatchite-A] American Mineralogist +4 other references |
| [Veatchite-A] American Mineralogist +4 other references | |
UK | |
| [Veatchite-1M] Milne (1978) |
| [Veatchite-1M] Beevers et al. (1960) |
| [Veatchite-1M] Smith et al. (2014) | |
USA | |
| [Veatchite-1M] Chandler (1996) +1 other reference |
| |
| [Veatchite-A] Bernard et al. (2004) |
| Clark et al. (1959) +2 other references |
| Benda (1960) +2 other references | |
| Omer B. Raup and Beth M. Madsen (1986) |
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The
Lang Mine, Tick Canyon Borate deposit, Tick Canyon, Lang, Los Angeles County, California, USA