Reinhardbraunsite
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Reinhard Brauns
Formula:
Ca5(SiO4)2(OH)2
System:
Monoclinic
Colour:
Pale pink
Lustre:
Vitreous
Hardness:
5 - 6
Member of:
Name:
Dr. Reinhard Brauns died on January 28, 1937, he was born at Eiterfeld, near Cassel, Germany, August 20, 1867.
Since 1907 he taught as Professor of Mineralogy and Petrography at the University of Bonn. As a scientist Professor Brauns was very versatile. His numerous contributions dealt with many phases of mineralogy and petrography. Of his publications, which number nearly two hundred, reference will be made only to his classical studies on the optical anomalies of crystals, his excellent treatise on chemical mineralogy, and his many articles dealing with the rocks and minerals of the volcanic areas of the Rheinland and the famous Laacher See district. To these must be added many fundamental papers in which he discussed the properties of gem minerals.
Since 1907 he taught as Professor of Mineralogy and Petrography at the University of Bonn. As a scientist Professor Brauns was very versatile. His numerous contributions dealt with many phases of mineralogy and petrography. Of his publications, which number nearly two hundred, reference will be made only to his classical studies on the optical anomalies of crystals, his excellent treatise on chemical mineralogy, and his many articles dealing with the rocks and minerals of the volcanic areas of the Rheinland and the famous Laacher See district. To these must be added many fundamental papers in which he discussed the properties of gem minerals.
Isostructural with:
Classification of Reinhardbraunsite
Approved
Approval Year:
1980
8/B.04-70
9.AF.45
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination
52.3.2b.3
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
52 : NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
3 : Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
14.2.7
14 : Silicates not Containing Aluminum
2 : Silicates of Cu
14 : Silicates not Containing Aluminum
2 : Silicates of Cu
Physical Properties of Reinhardbraunsite
Vitreous
Diaphaneity (Transparency):
Translucent
Colour:
Pale pink
Hardness (Mohs):
5 - 6
Optical Data of Reinhardbraunsite
Type:
Biaxial (-)
RI values:
nα = 1.606 nβ = 1.617 nγ = 1.620
2V:
Measured: 44° to 50°, Calculated: 54°
Max Birefringence:
δ = 0.014
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v
Chemical Properties of Reinhardbraunsite
IMA Formula:
Ca5(SiO4)2(OH)2
Elements listed in formula:
Common Impurities:
H2O,P
Crystallography of Reinhardbraunsite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Cell Parameters:
a = 11.45 Å, b = 5.05 Å, c = 8.84 Å
β = 108.91°
β = 108.91°
Ratio:
a:b:c = 2.267 : 1 : 1.75
Unit Cell Volume:
V 483.56 ų (Calculated from Unit Cell)
Type Occurrence of Reinhardbraunsite
Relationship of Reinhardbraunsite to other Species
Member of:
Other Members of Group:
| Chegemite | Ca7(SiO4)3(OH)2 |
| Edgrewite | Ca9(SiO4)4F2 |
| Kumtyubeite | Ca5(SiO4)2F2 |
| 9.AF.05 | Sillimanite | Al2OSiO4 |
| 9.AF.10 | Andalusite | Al2SiO5 |
| 9.AF.10 | Kanonaite | Mn3+AlOSiO4 |
| 9.AF.15 | Kyanite | Al2OSiO4 |
| 9.AF.20 | Mullite | Al4+2xSi2-2xO10-x (x~0.4) |
| 9.AF.20 | Krieselite | Al2GeO4(OH)2 |
| 9.AF.23 | Boromullite | Al9BSi2O19 |
| 9.AF.25 | Yoderite | (MgAl3)(MgAl)Al2O2(SiO4)4(OH)2 |
| 9.AF.30 | Magnesiostaurolite | Mg(Mg,Li)3(Al,Mg)18Si8O44(OH)4 |
| 9.AF.30 | Staurolite | Fe22+Al9Si4O23(OH) |
| 9.AF.30 | Zincostaurolite | Zn2Al9Si4O23(OH) |
| 9.AF.35 | Topaz | Al2SiO4F2 |
| 9.AF.40 | Norbergite | Mg3SiO4F2 |
| 9.AF.45 | Alleghanyite | Mn52+(SiO4)2(OH)2 |
| 9.AF.45 | Chondrodite | Mg5(SiO4)2F2 |
| 9.AF.45 | Kumtyubeite | Ca5(SiO4)2F2 |
| 9.AF.45 | Hydroxylchondrodite | Mg5(SiO4)2(OH)2 |
| 9.AF.50 | Humite | Mg7(SiO4)3(F,OH)2 |
| 9.AF.50 | Manganhumite | Mn72+(SiO4)3(OH)2 |
| 9.AF.50 | Unnamed (Ca-analogue of Humite) | Ca7(SiO4)4F2 |
| 9.AF.55 | Clinohumite | Mg9(SiO4)4F2 |
| 9.AF.55 | Sonolite | Mn92+(SiO4)4(OH)2 |
| 9.AF.55 | Hydroxylclinohumite | Mg9(SiO4)4(OH)2 |
| 9.AF.60 | Leucophoenicite | Mn72+(SiO4)3(OH)2 |
| 9.AF.65 | Ribbeite | Mn52+(SiO4)2(OH)2 |
| 9.AF.70 | Jerrygibbsite | Mn92+(SiO4)4(OH)2 |
| 9.AF.75 | Franciscanite | Mn62+V5+(SiO4)2(O,OH)6 |
| 9.AF.75 | Örebroite | Mn62+(Fe3+,Sb5+)2(SiO4)2(O,OH)6 |
| 9.AF.75 | Welinite | (Mn4+,W)(Mn2+,Mg)(SiO4)(O,OH)3 |
| 9.AF.80 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 |
| 9.AF.85 | Chloritoid | Fe2+Al2OSiO4(OH)2 |
| 9.AF.85 | Magnesiochloritoid | MgAl2O(SiO4)(OH)2 |
| 9.AF.85 | Ottrélite | Mn2+Al2O(SiO4)(OH)2 |
| 9.AF.90 | Poldervaartite | Ca(Ca,Mn)(SiO3OH)(OH) |
| 9.AF.90 | Olmiite | CaMnSiO3(OH)2 |
| 14.2.1 | Dioptase | CuSiO3 · H2O |
| 14.2.2 | Shattuckite | Cu5(SiO3)4(OH)2 |
| 14.2.3 | Plancheite | Cu8(Si4O11)2(OH)4 · H2O |
| 14.2.4 | Gilalite | Cu5Si6O17 · 7H2O |
| 14.2.5 | Chrysocolla | (Cu2-xAlx)H2-xSi2O5(OH)4 · nH2O |
| 14.2.6 | Litidionite | KNaCuSi4O10 |
| 14.2.8 | Cuprorivaite | CaCuSi4O10 |
| 14.2.9 | Kinoite | Ca2Cu2Si3O10 · 2H2O |
| 14.2.10 | Stringhamite | CaCuSiO4 · H2O |
| 14.2.11 | Apachite | Cu92+Si10O29 · 11H2O |
Other Names for Reinhardbraunsite
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 Reinhardbraunsite
Reference List:
Hamm, H. M., Hentschel, G., (1983): Reinhardbraunsit, Ca5(SiO4)2(OH,F)2, a new mineral - the natural equivalent of synthetic „calcio-chondrodite“: Neues Jahrb. Mineral. Mh. (1983): 119-129.
American Mineralogist (1983): 68: 1039-1040.
Tschermaks Mineralogische und Petrographische Mitteilungen: 31: 137-150.
American Mineralogist, Volume 94, pages 1361–1370, 2009
American Mineralogist (1983): 68: 1039-1040.
Tschermaks Mineralogische und Petrographische Mitteilungen: 31: 137-150.
American Mineralogist, Volume 94, pages 1361–1370, 2009
Internet Links for Reinhardbraunsite
mindat.org URL:
https://www.mindat.org/min-3387.html
Please feel free to link to this page.
Please feel free to link to this page.
External Links:
Mineral Dealers:
Localities for Reinhardbraunsite
map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the 
symbol to view information about a locality.
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can be used to jump to that position on the map.
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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.
Czech Republic | |
| Hršelová, P., Cempírek, J., Houzar, S., Sejkora, J. (2013): S,F,Cl-rich mineral assemblages from burned spoil heaps in the Rosice-Oslavany coalfield, Czech Republic. Can. Mineral.: 51(1): 171-188 |
Germany | |
| Schüller, W., Betz, V., Die Mineralien vom Emmelberg, Lapis 12/1986 |
| Hamm, H. M., Hentschel, G., Reinhardbraunsit, Ca5(SiO4)2(OH,F)2, a new mineral - the natural equivalent of synthetic „calcio-chondrodite“ –, N. Jb. Mineral. Mh., 119-129, 1983 |
| Galuskin, E.V., Krüger, B., Krüger, H., Blass, G., Widmer, R., Galuskina, I.O. (2016): Wernerkrauseite, CaFe3+2Mn4+O6 - the first non-stoichiometric post-spinel mineral, from Bellerberg volcano, Eifel, Germany. European Journal of Mineralogy, 28, 485-493 | |
Israel | |
| Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77. |
Romania | |
| Szakáll, S., Kristály, F., 2010. Mineralogy of Székelyland, Eastern Transylvania, Romania. Sfântu Gheorghe-Miercurea Ciuc-Târgu Mureş. 2010. |
| Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp. |
Russia | |
| Galuskin, E.V., Galuskina, I.O., Kusz, J., Gfeller, F., Armbruster, T., Bailau, R., Dulski, M., Gazeev, V.M., Pertsev, N.N., Zadov, A.E., Dzieržanowski, P. (2015): Mayenite supergroup, part II: Chlorkyuygenite from Upper Chegem, northern Caucasus Kabardino-Balkaria, Russia, a new microporous mayenite supergroup mineral with “zeolitic” H2O. European Journal of Mineralogy. 27, 113-122; Bailau, R., Gałuskin, E. V., Gazeev, V. M., & Gałuskina, I. O. Raman investigation of potential new mineral-Fe 3-analogue of wadalite from calcareous-silicate xenoliths of the Upper Chegem caldera, Northern Caucasus, Russia. |
| Galuskin, E.V., Galuskina, I.O., Gazeev, V.M., Dzierżanowski, P., Prusik, K., Pertsev, N.N., Zadov, A.E., Bailau, R., Gurbanov, A.G. (2011): Megawite, CaSnO3: a new perovskite-group mineral from skarns of the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia. Mineralogical Magazine, 75, 2563-2572. |
| Galuskin, E. V.; Gazeev, V. M.; Lazic, B.; Armbruster, T.; Galuskina, I. O.; Zadov, A. E.; Pertsev, N. N.; Wrzalik, R.; Dzierzanowski, P.; Gurbanov, A. G. & Bzowska, G. (2009): Chegemite Ca7(SiO4)3(OH)2 - a new humite-group calcium mineral from the Northern Caucasus, Kabardino-Balkaria, Russia. European Journal of Mineralogy 21, 1045-1059. | |
Uganda | |
| Barker, D.S. and Nixon, P.H. (1989) High-Ca, low-alkali carbonatite volcanism at Fort Portal, Uganda. Contributions to Minralogy and Petrology.: 103: 166-177. |
Caspar quarry, Bellerberg volcano, Ettringen, Mayen, Eifel, Rhineland-Palatinate, Germany