Veatchite-1M
A structural variant of Veatchite
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About Veatchite-1M
Formula:
Sr2B11O16(OH)5 · H2O
Colour:
Colourless to white
Lustre:
Vitreous, Pearly
Hardness:
2
Crystal System:
Monoclinic
Name:
Named as a primitive space-lattice polytype of veachite.
First Recorded Locality:
Unique Identifiers
Mindat ID:
7351
Long-form identifier:
mindat:1:1:7351:2
Similar Names
| Veatchit-2M | A synonym of 'Veatchite-2M' |
Classification of Veatchite-1M
6.EC.15
6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
Physical Properties of Veatchite-1M
Optical Data of Veatchite-1M
Type:
Biaxial (+)
RI values:
nα = 1.55 nβ = 1.553 nγ = 1.62
2V:
Measured: 25° , Calculated: 26°
Max. Birefringence:
δ = 0.070
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
Chemistry of Veatchite-1M
Mindat Formula:
Sr2B11O16(OH)5 · H2O
Element Weights:
Elements listed:
Crystallography of Veatchite-1M
Crystal System:
Monoclinic
Class (H-M):
2 - Sphenoidal
Space Group:
P21
Setting:
P21
Cell Parameters:
a = 6.7127(4) Å, b = 20.704(1) Å, c = 6.6272(4) Å
β = 119.209(1)°
β = 119.209(1)°
Ratio:
a:b:c = 0.324 : 1 : 0.32
Unit Cell V:
803.93 ų (Calculated from Unit Cell)
Z:
2
First Recorded Occurrence of Veatchite-1M
Synonyms of Veatchite-1M
Other Language Names for Veatchite-1M
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 | 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:
Billie mine material [cm-1]: 3435, 3350, 3235, 3130, 1654w, 1485, 1437, 1367s, 1265, 1170sh, 1150sh, 1100, 1070, 990s, 933s, 855, 820, 767, 704, 679w, 631, 607, 567w, 491w, 477w, 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-1M
mindat.org URL:
https://www.mindat.org/min-7351.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
Mineral Dealers:
References for Veatchite-1M
Reference List:
Clark, J. R., Mrose, M. E. (1960) Veatchite and ρ-veatchite. American Mineralogist, 45 (11-12) 1221-1229
Braitsch, Otto (1969) Über p-Veatchit, eine neue Veatchit-Varietät aus dem Zechsteinsalz. Beiträge zur Mineralogie und Petrographie, 6 (5). 352-356 doi:10.1007/bf01150422
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-1M
Showing 7 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.
Germany (FRL) | |
| Braitsch (1969) |
| Siemroth (2008) |
Russia | |
| |
UK | |
| Milne (1978) |
| Beevers et al. (1960) |
| Smith et al. (2014) | |
USA | |
| libraryphoto.cr.usgs.gov (n.d.) |
Kohnstein Quarry, Niedersachswerfen, Harztor, Nordhausen District, Thuringia, Germany