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About RosenhahniteHide

White, beige, colourless, yellow-brown
4½ - 5
Specific Gravity:
Crystal System:
Named by Adolf Pabst, E.B. Gross, and J.T Alfors in 1967 in honor of Leo Rosenhahn (1903/4 - 1991), amateur mineralogist from San Anselmo, California, USA.
This page provides mineralogical data about Rosenhahnite.

Classification of RosenhahniteHide

First Published:

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination

57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups

14 : Silicates not Containing Aluminum
5 : Silicates of Ca

Physical Properties of RosenhahniteHide

Transparent, Translucent
White, beige, colourless, yellow-brown
4½ - 5 on Mohs scale
2.89 g/cm3 (Measured)    
Berman balance.

Optical Data of RosenhahniteHide

Biaxial (-)
RI values:
nα = 1.608 - 1.625 nβ = 1.640 - 1.650 nγ = 1.646 - 1.650
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v

Chemical Properties of RosenhahniteHide

IMA Formula:
Common Impurities:

Crystallography of RosenhahniteHide

Crystal System:
Cell Parameters:
a = 6.95 Å, b = 9.48 Å, c = 6.81 Å
α = 108.64°, β = 94.84°, γ = 95.89°
a:b:c = 0.733 : 1 : 0.718
Unit Cell V:
419.62 ų (Calculated from Unit Cell)
The type crystals are tabular to lathlike with {010} by far the most prominent form. Other forms observed include {001}, {100}, {140}, {110}, {210}, {1-10}, {2-10}, {0-32}, {0-21}, {0-31}, {-101}, {-1-22}.

Type Occurrence of RosenhahniteHide

General Appearance of Type Material:
Narrow veinlets less than 3 cm thick with small pockets.
Place of Conservation of Type Material:
California Division of Mines & Geology, San Francisco, California.
National Museum of Natural History, Washington, D.C., USA 120124, 134562.
The Natural History Museum, London England, 1976,392-393.
Associated Minerals at Type Locality:

Synonyms of RosenhahniteHide

Other Language Names for RosenhahniteHide

Related Minerals - Nickel-Strunz GroupingHide

9.BJ.05OrientiteCa8Mn3+10(SiO4)3(Si3O10)3(OH)10 · 4H2O Orth.
9.BJ.15TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
9.BJ.25TiragalloiteMn2+4As5+Si3O12(OH)Mon. 2/m
9.BJ.35RuiziteCa2Mn3+2[Si4O11(OH)2](OH)2·2H2OMon. 2
9.BJ.40Ardennite-(As)Mn2+4Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m)
9.BJ.40Ardennite-(V)Mn2+4Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6Orth. mmm (2/m 2/m 2/m) : Pmmn
9.BJ.50KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
9.BJ.55ZunyiteAl13Si5O20(OH,F)18ClIso. 4 3m : F4 3m
9.BJ.60HubeiteCa2Mn2+Fe3+[HSi4O13] · 2H2OTric.
9.BJ.65Cassagnaite(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8Orth. mmm (2/m 2/m 2/m) : Cmcm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.5.1WollastoniteCaSiO3Tric. 1 : P1
14.5.4RankiniteCa3Si2O7Mon. 2/m : P21/b
14.5.11AfwilliteCa3(HSiO4)2 · 2H2OMon. m : Bb
14.5.12XonotliteCa6(Si6O17)(OH)2Mon. 2/m
14.5.14HillebranditeCa2(SiO3)(OH)2Orth. mmm (2/m 2/m 2/m) : Cmcm
14.5.15JaffeiteCa6(Si2O7)(OH)6Trig. 3 : P3
14.5.16SuoluniteCa2(H2Si2O7) · H2OOrth.
14.5.18OkeniteCa10Si18O46 · 18H2OTric. 1 : P1
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2OOrth.
14.5.20TrabzoniteCa4(Si3O9)(OH)2Orth. mm2 : Ama2
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric.
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Orth.
14.5.24Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)Mon.
14.5.25NekoiteCa3Si6O15·7H2OTric. 1 : P1
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)Orth.
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2OTric.

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 RosenhahniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Pabst, A., Gross, E.B., Alfors, J.T. (1967) Rosenhahnite, a new hydrous calcium silicate from Mendocino County, California. American Mineralogist: 52: 336-351.
Jeffery, J.W., Lindley, P.F. (1973) Remarkable new silicate structure. Nature: 241: 42-43.
Wan, C., Ghose, S., Gibbs, G.V. (1977) Rosenhahnite, Ca3Si3O8(OH)2: crystal structure and stereochemical configuration of the hydroxylated trisilicate group [Si3O8(OH)2]. American Mineralogist: 62: 503-512.
Zadov, A.E., Chukanov, N.V., Organova, N.I., Kuz'mina, O.V., Belakovskii, D.I., Nechai, V.G., Sokolovskii, F.S., Kuznetsova, O.Yu. (2000) Comparative study of rosenhahnite from California and from the Urals. Improvement of the formula. Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva: 129: 85-96. (in Russian)
Jambor, J.L., Grew, E.S., Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 181-184.

Internet Links for RosenhahniteHide

Localities for RosenhahniteHide

ⓘ - 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
  • Vysočina Region
    • Havlíčkův Brod District
      • Havlíčkův Brod (Německý Brod; Deutschbrod)
        • Chotěboř (Chotieborsch; Potiworz)
Marek V.: Rosenhahnite from Staré Ransko (East Bohemia), Czechoslovakia. Časopis pro mineralogii a geologii, 1979, 24, 3, 285-289.
  • Honshu Island
    • Chugoku Region
      • Hiroshima prefecture
        • Shoubara City
Henmi, et al (1982) Sanko-Gakkai Kou'en-Youshi, 154.
  • Shikoku Island
    • Kochi Prefecture
      • Kochi City
        • Engyouji (Engyoji)
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
        • Rendai
Mineralogical Journal Vol. 13 (1986) , No. 6 pp368-375
New Zealand
  • North Island
    • Waikato Region
      • Waitomo District
        • Piopio
Leach, T. M. & Rodgers, K. A. (1977): Rosenhahnite Ca3Si3O8(OH)2 - a further occurrence. Mineralogical Magazine 41, 394-395; Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols
  • Sverdlovsk Oblast
    • Asbest
Zadov, A. E.; Chukanov, N. V.; Organova, N. I.; Kuz'mina, O. V.; Belakovskii, D. I.; Nechai, V. G.; Sokolovskii, F. S.; Kuznetsova, O. Yu. (2000): Comparative study of rosenhahnite from California and from the Urals. Improvement of the formula. Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 129, 85-96. (in Russian.) ; [World of Stones 2:93 p35]; Antonov A.A. [Антонов А.А.] (2003): Mineralogy of rodingites of the Bazhenovsk ultrabasic massif [Минералогия родингитов Баженовского гипербазитого массива]. Nauka, Sankt-Peterburg, 129 pp. (in Russian).
  • California
    • Mendocino Co.
      • Cloverdale area
        • Russian River
Pabst, Adolf, Gross, E.B., and Alfors, J.T. (1967) Rosenhahnite, a new hydrous calcium silicate from Mendocino County, California. American Mineralogist: 52: 336-351; Wan, C., Ghose, S., and Gibbs, G.V. (1977a) Rosenhahnite, Ca3Si3O8(OH)2: crystal structure and stereochemical configuration of the hydroxylated trisilicate group [Si3O8(OH)2]. American Mineralogist: 62: 503; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 407, 409; American Mineralogist (2002): 87: 184.
  • North Carolina
    • Durham Co.
      • Durham
Handbook of Mineralogy - Anthony, Bideaux, Bladh, Nichols; Kenny Gay message 15.09.2005; Mineralogical Magazine 1977 41 : 394-395 Gerald Barmarin 2009-2010 Complete list of Luminescent Minerals
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