Reyerite Mineral Data

General Reyerite Information

Chemical Formula:

(Na,K)4Ca14Si22Al2O58(OH)8•6(H2O)

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

Empirical Formula:

Na₃KCa₁₄Si₂₂Al₂O₅₈(OH)₈•6(H₂O)

Environment:

In cavities in basalt and basic tuffs.

IMA Status:

Valid Species (Pre-IMA) 1907

Locality:

Niaqornat, Nuussuaq, Greenland. Link to MinDat.org Location Data.

Name Origin:

Named for Eduard Reyer (1849-1907), Austrian geologist.

Name Pronunciation:

Reyerite

Synonym:

ICSD 68171

PDF 29-1039

Reyerite Image

Images:

Reyerite

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

Axial Ratios:

a:c = 1:1.95309

Cell Dimensions:

a = 9.764, c = 19.07, Z = 1; V = 1,574.48 Den(Calc)= 2.65

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: P 3

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.17(1), 2.659(0.8), 2.855(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Merlino S , Mineralogical Magazine , 52 (1988) p.247-256, The structure of reyerite, (Na,K)2Ca14Si22Al2O58(OH)8*6H2O, Locality: Niakornak, Greenland, Note: anisoU s from ICSD

Physical Properties of Reyerite

Cleavage:

{0001} Perfect

Color:

Colorless, White, Light green.

Density:

2.54 - 2.578, Average = 2.55

Diaphaneity:

Transparent to Translucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Massive - Uniformly indistinguishable crystals forming large masses.

Habit:

Micaceous - Platy texture with "flexible" plates.

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Reyerite

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

Optical Data:

Uniaxial (-), e=1.558-1.563, w=1.5558-1.563, bire=0.0000-0.0022.

Calculated Properties of Reyerite

Electron Density:

Bulk Density (Electron Density)=2.57 gm/cc
note: Specific Gravity of Reyerite =2.56 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Reyerite= 3.94 barns/electron
U=PE_Reyerite x r_electron= 10.12 barns/cc.

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

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

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

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)

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
15 - WWW-MINCRYST

Search for Reyerite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Reyerite :

A Bijoux Google Search for Reyerite
Adam's Minerals Google Search for Reyerite
Cape Minerals Google Search for Reyerite
Dakota Matrix Minerals Google Search for Reyerite
Excalibur Mineral Corp. Google Search for Reyerite
Exceptional Minerals Google Search for Reyerite
John Betts Fine Minerals Search for Reyerite
McDougall Minerals Google Search for Reyerite
Mineral News Website Link
Rock and Mineral Shows Google Search for Reyerite
Weinrich Minerals, Inc. Google Search for Reyerite

Ask about Reyerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Reyerite Specimen Label here :

Reyerite

(Na,K)4Ca14Si22Al2O58(OH)8•6(H2O)
Dana No: 73.02.02a.01 Strunz No: 09.EE.35
Locality:

Notes: