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Rosenhahnite

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Formula:
HCa3[Si3O9(OH)]
System:
Triclinic
Colour:
White, beige, ...
Hardness:
4½ - 5
Name:
Named after Leo Rosenhahn, amateur mineralogist
This page provides mineralogical data about Rosenhahnite.

Classification of Rosenhahnite

Approved
9.BJ.10

9 : SILICATES (Germanates)
B : Sorosilicates
J : Sorosilicates with Si3O10, Si4O11, etc. anions; cations in octahedral [6] and greater coordination
57.1.4.1

57 : SOROSILICATES Si3O10 Groups and Larger Noncyclic Groups
1 : Insular Si3O10 and Larger Noncyclic Groups with [Si3O10] groups
14.5.9

14 : Silicates not Containing Aluminum
5 : Silicates of Ca
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Type Occurrence of Rosenhahnite

Year of Discovery:
1967

Physical Properties of Rosenhahnite

Vitreous
Colour:
White, beige, colourless, yellow-brown
Streak:
White
Hardness (Mohs):
4½ - 5

Crystallography of Rosenhahnite

Crystal System:
Triclinic
Cell Parameters:
a = 6.95Å, b = 9.48Å, c = 6.81Å
α = 108.64°, β = 94.84°, γ = 95.89°
Ratio:
a:b:c = 0.733 : 1 : 0.718

Optical Data of Rosenhahnite

Type:
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:
Moderate
Dispersion:
r < v

Chemical Properties of Rosenhahnite

Formula:
HCa3[Si3O9(OH)]
Essential elements:
All elements listed in formula:
Common Impurities:
B,Al,Fe,Mn,Mg,Sr,Ba,Na,H2O

Relationship of Rosenhahnite to other Species

9.BJ.05OrientiteCa8Mn103+(SiO4)3(Si3O10)3(OH)10 · 4H2O
9.BJ.15TrabzoniteCa4(Si3O9)(OH)2
9.BJ.20Thalénite-(Y)Y3Si3O10F
9.BJ.25TiragalloiteMn42+(HAsSi3O13)
9.BJ.30Medaite(Mn,Ca)6(V,As)Si5O18OH
9.BJ.35RuiziteCa2Mn23+[(OH)2|H2Si4O13] · 2H2O
9.BJ.40Ardennite-(As)Mn42+Al4(AlMg)(AsO4)(SiO4)2(Si3O10)(OH)6
9.BJ.40Ardennite-(V)Mn42+Al4(AlMg)(VO4)(SiO4)2(Si3O10)(OH)6
9.BJ.45KilchoaniteCa6(SiO4)(Si3O10)
9.BJ.50KornerupineMg3Al6(Si,Al,B)5O21(OH)
9.BJ.50Prismatine(◻,Fe,Mg)(Mg,Al,Fe)5Al4Si2(Si,Al)2(B,Si,Al)(O,OH,F)22
9.BJ.55ZunyiteAl13Si5O20(OH,F)18Cl
9.BJ.60HubeiteCa2Mn2+Fe3+[HSi4O13] · 2H2O
9.BJ.65Cassagnaite(Ca,Mn2+)4(Fe3+,Mn3+,Al)4(V3+,Mg,Al)2(Si3O10)(SiO4)2(OH,O)8
14.5.1WollastoniteCaSiO3
14.5.2Wollastonite-7T
14.5.3Wollastonite-2MCaSiO3
14.5.4RankiniteCa3Si2O7
14.5.5KilchoaniteCa6(SiO4)(Si3O10)
14.5.6LarniteCa2SiO4
14.5.7BredigiteCa7Mg(SiO4)4
14.5.8HatruriteCa3(SiO4)O
14.5.10DellaiteCa6(Si2O7)(SiO4)(OH)2
14.5.11AfwilliteCa3(HSiO4)2 · 2H2O
14.5.12XonotliteCa6(Si6O17)(OH)2
14.5.13FoshagiteCa4(Si3O9)(OH)2
14.5.14HillebranditeCa2(SiO3)(OH)2
14.5.15JaffeiteCa6(Si2O7)(OH)6
14.5.16SuoluniteCa2(H2Si2O7) · H2O
14.5.17KillalaiteCa6.4(H0.6Si2O7)2(OH)2
14.5.18OkeniteCa10Si18O46 · 18H2O
14.5.19RiversideiteCa5(HSi3O9)2 · 2H2O
14.5.20TrabzoniteCa4(Si3O9)(OH)2
14.5.21GyroliteNaCa16Si23AlO60(OH)8 · 14H2O
14.5.22FoshallasiteCa3[Si2O7] · 3H2O(?)
14.5.23Tobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
14.5.24Clinotobermorite[Ca4Si6O17 · 2H2O]·(Ca·3H2O)
14.5.25NekoiteCa3Si6O15·7H2O
14.5.26Plombièrite[Ca4Si6O16(OH)2 · 2H2O]·(Ca·5H2O)
14.5.27JenniteCa9(Si3O9)2(OH)8 · 8H2O

Other Names for Rosenhahnite

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 Rosenhahnite

Reference List:
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.

Jeffery, J. W. & Lindley, P. F. (1973): Remarkable new silicate structure. Nature 241, 42-43.

Wan, C., Ghose, S., and 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.)

Internet Links for Rosenhahnite

Localities for Rosenhahnite

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.
(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
 
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Havlíčkův Brod (Německý Brod; Deutschbrod)
Marek V.: Rosenhahnite from Staré Ransko (East Bohemia), Czechoslovakia. Časopis pro mineralogii a geologii, 1979, 24, 3, 285-289.
Japan
 
  • Honshu Island
    • Chugoku Region
      • Hiroshima prefecture
        • Hiba-gun
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
      • 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
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya 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]
USA (TL)
 
  • 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
Mineral and/or Locality  
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