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Reyerite Mineral Data

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General Reyerite Information

Help on Chemical  Formula: Chemical Formula: (Na,K)4Ca14Si22Al2O58(OH)8•6(H2O)
Help on Composition: Composition: Molecular Weight = 2,513.12 gm
   Potassium   1.56 %  K     1.87 % K2O
   Sodium      2.74 %  Na    3.70 % Na2O
   Calcium    22.33 %  Ca   31.24 % CaO
   Aluminum    2.15 %  Al    4.06 % Al2O3
   Silicon    24.59 %  Si   52.60 % SiO2
   Hydrogen    0.80 %  H     7.17 % H2O
   Oxygen     45.84 %  O
             ______        ______ 
             100.00 %      100.64 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na3KCa14Si22Al2O58(OH)8•6(H2O)
Help on Environment: Environment: In cavities in basalt and basic tuffs.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1907
Help on Locality: Locality: Niaqornat, Nuussuaq, Greenland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Eduard Reyer (1849-1907), Austrian geologist.
Help on Name Pronunciation: Name Pronunciation: Reyerite Say REYERITE
Help on Synonym: Synonym: ICSD 68171
  PDF 29-1039

Reyerite Image

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Comments: Micaceous white plates of reyerite in cavity in basalt.
Location: Drynoch near Carbost, Isle of Skye, Scotland. Scale: Specimen Size 1.5x2 cm.
© Diederik Visser

Reyerite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.95309
Help on Cell Dimensions: Cell Dimensions: a = 9.764, c = 19.07, Z = 1; V = 1,574.48 Den(Calc)= 2.65
Help on Crystal System: Crystal System: Trigonal - Rhombohedral H-M Symbol ( 3) Space Group: P 3
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.17(1), 2.659(0.8), 2.855(0.8),

Physical Properties of Reyerite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, White, Light green.
Help on Density: Density: 2.54 - 2.578, Average = 2.55
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Micaceous - Platy texture with "flexible" plates.
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 3-4 - Calcite-Fluorite
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Reyerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2113,KPDmeas= 0.2188,KC= 0.2185
Ncalc = 1.55 - 1.58
Help on Optical Data: Optical Data: Uniaxial (-), e=1.558-1.563, w=1.5558-1.563, bire=0.0000-0.0022.

Calculated Properties of Reyerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Reyerite =2.56 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEReyerite = 3.94 barns/electron
U=PEReyerite x relectron= 10.12 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 22.53 (Gamma Ray American Petroleum Institute Units)
Concentration of Reyerite per GRapi unit = 4.44 (%)

Estimated Radioactivity from Reyerite - barely detectable


Reyerite Classification

Help on  Dana Class: Dana Class: 73.02.02a.01 (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.02)with double and single layers
  (73.02.02a)Reyerite group (Reyerite Subgroup)
73.02.02a.01 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8•6(H2O) P 3 3
73.02.02a.02 Truscottite (Ca,Mn)14Si24O58(OH)8•2(H2O) p3 or p3 Trig
Help on  Strunz Class: Strunz Class: 09.EE.35 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.35 Reyerite (Na,K)4Ca14Si22Al2O58(OH)8•6(H2O) P 3 3
09.EE.35 Truscottite (Ca,Mn)14Si24O58(OH)8•2(H2O) p3 or p3 Trig

Other Reyerite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Reyerite :
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: 73.02.02a.01 Strunz No: 09.EE.35





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