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Rosenhahnite Mineral Data

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General Rosenhahnite Information

Help on Chemical  Formula: Chemical Formula: Ca3Si3O8[(OH)2-4x,(CO3)x]
Help on Composition: Composition: Molecular Weight = 370.80 gm
   Calcium   32.43 %  Ca   45.37 % CaO
   Silicon   22.72 %  Si   48.61 % SiO2
   Hydrogen   0.52 %  H     4.62 % H2O
   Carbon     0.32 %  C     1.19 % CO2
   Oxygen    44.01 %  O
            ______        ______ 
            100.00 %       99.78 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca3Si3O8(OH)1.9(CO3)0.1
Help on Environment: Environment: High pressure metamorphic mineral found in graywackes and serpentinites.
Help on IMA Status: IMA Status: Approved IMA 1967
Help on Locality: Locality: Russian River, 5 miles NNW of Colverdale, Mendocino Co., California. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Leo Rosenhahn (1904-1991), American amateur mineralogist, who found the mineral.
Help on Name Pronunciation: Name Pronunciation: Rosenhahnite + Pronunciation Say ROSENHAHNITE
Help on Synonym: Synonym: ICSD 100074
  PDF 29-378

Rosenhahnite Image

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Comments: Crystalline massive rosenhahnite.
Location: Near Healdsburg, Mendocino County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rosenhahnite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7333:1:0.7182
Help on Cell Dimensions: Cell Dimensions: a = 6.955, b = 9.484, c = 6.812, Z = 2; alpha = 108.64°, beta = 94.84°, gamma = 95.89° V = 422.00 Den(Calc)= 2.92
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.201(1), 2.965(0.9), 3.043(0.6),

Physical Properties of Rosenhahnite

Help on Cleavage: Cleavage: {001} Perfect, {100} Good, {010} Good
Help on Color: Color: Beige white, Colorless.
Help on Density: Density: 2.89 - 2.92, Average = 2.9
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4.5-5 - Near Apatite
Help on Luminescence: Luminescence: Fluorescent, Short UV=yellowish green, Long UV=light orangish pink.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Rosenhahnite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2172,KPDmeas= 0.2191,KC= 0.2146
Ncalc = 1.62 - 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.608-1.625, b=1.64-1.65, g=1.646-1.65, bire=0.0250-0.0380
Help on Pleochroism (x): Pleochroism (x): colorless.
Help on Pleochroism (y): Pleochroism (y): colorless.
Help on Pleochroism (z): Pleochroism (z): colorless.

Calculated Properties of Rosenhahnite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.94 gm/cc
note: Specific Gravity of Rosenhahnite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PERosenhahnite = 4.84 barns/electron
U=PERosenhahnite x rElectron Density= 14.24 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rosenhahnite is Not Radioactive

Rosenhahnite Classification

Help on  Dana Class: Dana Class: (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups
  (57.01)with [Si3O10] groups
  (57.01.04)Dana Group Rosenhahnite Ca3Si3O8[(OH)2-4x,(CO3)x] P1 1
Help on  Strunz Class: Strunz Class: 09.BJ.10 09 - SILICATES (Germanates)
  09.B - Sorosilicates
  09.BJ -Sorosilicates with Si3O10, Si4O11, etc
09.BJ.10 Rosenhahnite Ca3Si3O8[(OH)2-4x,(CO3)x] P1 1

Other Rosenhahnite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Rosenhahnite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.BJ.10





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