Erionite-Ca Mineral Data

[Thumbnails] [Miniatures] [Cabinets] [About Us] [FAQ]
Welcome To Mason's Minerals
Your Source for Beautiful Minerals and Crystals
We offer a no-questioned-asked Satisfaction Guarantee

General Erionite-Ca Information

Chemical Formula:

(Ca,K2,Na2)2[Al4Si14O36]•15(H2O)

Composition:

Molecular Weight = 2,904.81 gm

Potassium 2.07 % K 2.50 % K₂O

Sodium 0.75 % Na 1.01 % Na₂O

Calcium 3.15 % Ca 4.40 % CaO

Magnesium 0.72 % Mg 1.19 % MgO

Aluminum 8.20 % Al 15.50 % Al₂O₃

Silicon 26.01 % Si 55.64 % SiO₂

Hydrogen 2.18 % H 19.44 % H₂O

Oxygen 56.92 % O

______ ______

100.00 % 99.69 % = TOTAL OXIDE

Empirical Formula:

Ca_2.28K_1.54Na_0.95Mg_0.86Al_8.83Si_26.9O₇₂•31.35(H₂O)

Environment:

Occurs in volcanic and sedimentary rocks. Found in amygdules in altered basalt.

IMA Status:

Approved IMA 1967 (Dana # Added)

Locality:

Maze, Niigata Prefecture, Japan. Link to MinDat.org Location Data.

Name Origin:

From the Greek for wool, in allusion to its white, fibrous, wool-like appearance. The Ca-dominant member of the erionite series.

Name Pronunciation:

Erionite-Ca

Erionite-Ca Image

Images:

Erionite-Ca

Comments: Radiating group of colorless acicular hexagonal prisms of erionite-Ca.
Location: Moeraki, Otago, South Island, New Zealand. Scale: See Image.
© Rruff Database

Erionite-Ca Crystallography

Axial Ratios:

a:c = 1:1.13185

Cell Dimensions:

a = 13.333, c = 15.091, Z = 1; V = 2,323.30 Den(Calc)= 2.08

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 11.41(1), 6.61(0.73), 4.322(0.67),

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

Gualtieri A , Artioli G , Passaglia E , Bigi S , Viani A , Hanson J C , American Mineralogist , 83 (1998) p.590-606, Crystal structure-crystal chemistry relationships in the zeolites erionite, and offretite, Sample from Lady Hill

View Additional jPOWD Structure files for Erionite-Ca
[1] [2] [3]

Physical Properties of Erionite-Ca

Cleavage:

{010} Distinct

Color:

White, Green, Gray, Orange.

Density:

2.09 - 2.13, Average = 2.11

Diaphaneity:

Transparent to translucent

Fracture:

Splintery - Thin, elongated fractures produced by intersecting good cleavages or partings (e.g. hornblende).

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Vitreous - Silky

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Erionite-Ca

Gladstone-Dale:

CI meas= 0.05 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.036 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2239,KPDmeas= 0.2207,KC= 0.2324
Ncalc = 1.48 - 1.49

Optical Data:

Uniaxial (+), w=1.4711, e=1.474, bire=0.0191.

Calculated Properties of Erionite-Ca

Electron Density:

Bulk Density (Electron Density)=2.11 gm/cc
note: Specific Gravity of Erionite-Ca =2.08 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Erionite-Ca= 1.90 barns/electron
U=PE_Erionite-Ca x r_electron= 4.01 barns/cc.

Radioactivity:

GRapi = 30.40 (Gamma Ray American Petroleum Institute Units)
Concentration of Erionite-Ca per GRapi unit = 3.29 (%)

Estimated Radioactivity from Erionite-Ca - barely detectable

Erionite-Ca Classification

Dana Class:

77.01.02.05b (77)Tectosilicate Zeolite group

(77.01)true zeolites

(77.01.02)Chabazite and related species

77.01.02.01 Chabazite-Ca (Ca0.5,Na,K)4[Al4Si8O24]•12H2O P1 1

77.01.02.01a Chabazite-Na! (Na2,K2,Ca,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.01b Chabazite-K! (K2,Ca,Na2,Mg)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.01c Chabazite-Sr! (Sr,Ca,K2,Na2)[Al2Si4O12]•6(H2O) R 3m 3 2/m

77.01.02.02 Herschelite? (Na,Ca,K)AlSi2O6•3(H2O) R 3m 3 2/m

77.01.02.03 Willhendersonite KCaAl3Si3O12•5(H2O) P1 1

77.01.02.04 Offretite (K2,Ca,Mg)2.5Al5Si13O36•15(H2O) P 6m2 6 m2

77.01.02.05 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.05a Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.05b Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06 Gmelinite-Na (Na2,Ca)Al2Si4O12•6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06a Gmelinite-Ca! (Ca,Na2)Al2Si4O12•6(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.06b Gmelinite-K! (K,Na,Ca)6(Al7Si17O48)•22(H2O) P 6₃/mmc 6/m 2/m 2/m

77.01.02.07 Faujasite-Na (Na2,Ca,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.07a Faujasite-Ca! (Ca,Na2,Mg)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.07b Faujasite-Mg! (Mg,Na2,Ca)3.5[Al7Si17O48]•32(H2O) F d3m 4/m 3 2/m

77.01.02.08 Levyne-Ca (Ca,Na2,K2)Al2Si4O12•6(H2O) R 3m 3 2/m

77.01.02.08a Levyne-Na! (Na2,Ca,K2)Al2Si4O12•6(H2O) R 3m 3 2/m

77.01.02.09 Tschortnerite! Ca4(Ca,Sr,K,Ba)3Cu3(OH)8[Si12Al12O48]•x(H2O),x>=20 F m3m 4/m 3 2/m

Strunz Class:

09.GD.20 09 - SILICATES (Germanates)

09.G - Tektosilicates with Zeolitic H2O

09.GD -Chains of 6-membered rings – tabular zeolites

09.GD.20 Bellbergite (K,Ba,Sr)2Sr2Ca2(Ca,Na)4Al18Si18O72•30(H2O) P 6₃/mmc, P 6₂c-, P 6₃mc Hex

09.GD.20 Erionite-Ca! (Ca,K2,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

09.GD.20 Erionite-K! (K2,Ca,Na2)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

09.GD.20 Erionite-Na (Na2,K2,Ca)2[Al4Si14O36]•15(H2O) P 6₃/mmc 6/m 2/m 2/m

Other Erionite-Ca Information

References:

NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Erionite-Ca :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Erionite-Ca using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Erionite-Ca :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Erionite-Ca Mineral Data :

Ask about Erionite-Ca 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 Erionite-Ca Specimen Label here :

Erionite-Ca

(Ca,K2,Na2)2[Al4Si14O36]•15(H2O)
Dana No: 77.01.02.05b Strunz No: 09.GD.20
Locality:

Notes: