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Reinhard Brauns
Pale pink
5 - 6
Crystal System:
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.
Humite Group.

The OH analogue of Kumtyubeite.

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Classification of ReinhardbraunsiteHide

Approval Year:

9 : SILICATES (Germanates)
A : Nesosilicates
F : Nesosilicates with additional anions; cations in [4], [5] and/or only [6] coordination

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 : Silicates not Containing Aluminum
2 : Silicates of Cu

Physical Properties of ReinhardbraunsiteHide

Pale pink
5 - 6 on Mohs scale

Optical Data of ReinhardbraunsiteHide

Biaxial (-)
RI values:
nα = 1.606 nβ = 1.617 nγ = 1.620
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:
r < v

Chemical Properties of ReinhardbraunsiteHide

IMA Formula:
Common Impurities:

Crystallography of ReinhardbraunsiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 11.45 Å, b = 5.05 Å, c = 8.84 Å
β = 108.91°
a:b:c = 2.267 : 1 : 1.75
Unit Cell V:
483.56 ų (Calculated from Unit Cell)

Type Occurrence of ReinhardbraunsiteHide

Synonyms of ReinhardbraunsiteHide

Other Language Names for ReinhardbraunsiteHide

Relationship of Reinhardbraunsite to other SpeciesHide

Other Members of this group:
ChegemiteCa7(SiO4)3(OH)2Orth. mmm (2/m 2/m 2/m)
EdgrewiteCa9(SiO4)4F2 Mon. 2/m : P21/b
KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b

Common AssociatesHide

Associated Minerals Based on Photo Data:
Brownmillerite1 photo of Reinhardbraunsite associated with Brownmillerite on

Related Minerals - Nickel-Strunz GroupingHide

9.AF.05SillimaniteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m)
9.AF.10AndalusiteAl2(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.10KanonaiteMn3+Al(SiO4)OOrth. mmm (2/m 2/m 2/m) : Pnnm
9.AF.15KyaniteAl2(SiO4)OTric. 1 : P1
9.AF.20MulliteAl4+2xSi2-2xO10-xOrth. mmm (2/m 2/m 2/m) : Pbam
9.AF.20Krieselite(Al,Ga)2(GeO4)(OH)2Orth. mmm (2/m 2/m 2/m) : Pnma
9.AF.23BoromulliteAl9BSi2O19Orth. mm2 : Cmc21
9.AF.25YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)Mon. 2/m : P21/m
9.AF.30MagnesiostauroliteMg(Mg,Li)3(Al,Mg)18Si8O44(OH)4Mon. 2/m : B2/m
9.AF.30StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.30ZincostauroliteZn2Al9Si4O23(OH)Mon. 2/m : B2/m
9.AF.35TopazAl2(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.40NorbergiteMg3(SiO4)(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.45AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.45Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b
9.AF.45KumtyubeiteCa5(SiO4)2F2Mon. 2/m : P21/b
9.AF.45HydroxylchondroditeMg5(SiO4)2(OH)2Mon. 2/m : P21/b
9.AF.50Humite(Mg,Fe2+)7(SiO4)3(F,OH)2Orth. mmm (2/m 2/m 2/m)
9.AF.50Unnamed (Ca-analogue of Humite)Ca7(SiO4)4F2Orth. mmm (2/m 2/m 2/m)
9.AF.55HydroxylclinohumiteMg9(SiO4)4(OH)2Mon. 2/m
9.AF.60LeucophoeniciteMn2+7(SiO4)3(OH)2Mon. 2/m : P21/b
9.AF.70JerrygibbsiteMn2+9(SiO4)4(OH)2Orth. mmm (2/m 2/m 2/m) : Pbcn
9.AF.75WeliniteMn2+6(W6+,Mg)2(SiO4)2(O,OH)6Trig. 3 : P3
9.AF.85Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.85MagnesiochloritoidMgAl2(SiO4)O(OH)2Mon. 2/m : B2/b
9.AF.90PoldervaartiteCaCa[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca
9.AF.90OlmiiteCaMn2+[SiO3(OH)](OH)Orth. mmm (2/m 2/m 2/m) : Pbca

Related Minerals - Dana Grouping (8th Ed.)Hide

52.3.2b.1AlleghanyiteMn2+5(SiO4)2(OH)2Mon. 2/m : P21/b
52.3.2b.2Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2Mon. 2/m : P21/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.2.1DioptaseCuSiO3 · H2OTrig. 3 : R3
14.2.2ShattuckiteCu5(Si2O6)2(OH)2Orth. mmm (2/m 2/m 2/m)
14.2.3PlancheiteCu8(Si8O22)(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
14.2.4GilaliteCu5Si6O17 · 7H2OMon.
14.2.5ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2OOrth.
14.2.8CuprorivaiteCaCuSi4O10Tet. 4/mmm (4/m 2/m 2/m) : P4/ncc
14.2.9KinoiteCa2Cu2(H2O)2[Si3O10]Mon. 2/m : P21/m
14.2.10StringhamiteCaCu(SiO4) · H2OMon.
14.2.11ApachiteCu9Si10O29 · 11H2OMon.

Other InformationHide

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 ReinhardbraunsiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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

Internet Links for ReinhardbraunsiteHide

Localities for ReinhardbraunsiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • Oslavany
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
  • Rhineland-Palatinate
    • Eifel
      • Daun
        • Üdersdorf
Schüller, W., Betz, V., Die Mineralien vom Emmelberg, Lapis 12/1986
      • Mayen
        • Ettringen
          • Bellerberg volcano
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
  • Negev
Vapnik, Y., Sokol, E., Murashko M., Sharygin V. (2006): The enigma of Hatrurim. Mineralogical Almanac, 10, 69-77.
  • Brașov Co.
    • Racoş Commune
Szakáll, S., Kristály, F., 2010. Mineralogy of Székelyland, Eastern Transylvania, Romania. Sfântu Gheorghe-Miercurea Ciuc-Târgu Mureş. 2010.
  • Harghita Co.
    • Odorheiu Secuiesc (Székelyudvarhely; Oderhellen)
      • Racoş (Racoşu de Jos)
Szakáll, S. & Kristály, F., Eds. (2010): Mineralogy of Székelyland, Eastern Transylvania, Romania. Csík County Nature and Conservation Society, Miercurea-Ciuc, Romania, 321 pp.
  • Northern Caucasus Region
    • Kabardino-Balkarian Republic
      • Baksan Valley
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.
          • Lakargi Mt.
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.
  • Western Region
    • Kabarole District
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.
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