Garronite Mineral Data

Garronite Mineral Data +

General Garronite Information

Chemical Formula:

Na2Ca5Al12Si20O64·27(H2O)

Composition:

Molecular Weight = 2,642.23 gm

Sodium 1.74 % Na 2.35 % Na₂O

Calcium 7.58 % Ca 10.61 % CaO

Aluminum 12.25 % Al 23.15 % Al₂O₃

Silicon 21.26 % Si 45.48 % SiO₂

Hydrogen 2.06 % H 18.41 % H₂O

Oxygen 55.10 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Ca₅Al₁₂Si₂₀O₆₄·27(H₂O)

IMA Status:

Approved IMA 1962

Locality:

Slopes of Glenariff Valley, Garron Plateau, County Antrim, Northern Ireland. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Garronite Image

Images:

Garronite Siderite

Comments: Translucent white micro crystals of garronite on brown siderite crystals.
Location: Mont Saint Hilaire, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Garronite Crystallography

Axial Ratios:

a:c = 1:1.04203

Cell Dimensions:

a = 9.873, c = 10.288, Z = 0.5; V = 1,002.83 Den(Calc)= 2.19

Crystal System:

Tetragonal - DipyramidalH-M Symbol (4/m) Space Group: I 4₁/a

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

By Intensity(I/I_o): 2.66(1), 3.14(1), 4.12(1),

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

Artioli G , American Mineralogist , 77 (1992) p.189-196, The crystal structure of garronite, sample from Goble, Oregon

View Additional jPOWD Structure files for Garronite
[1] [2] [3] [4]

Physical Properties of Garronite

Cleavage:

[???] Good, [???] Good

Color:

Colorless, White.

Density:

2.1 - 2.2, Average = 2.15

Diaphaniety:

Transparent to Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Massive - Fibrous - Distinctly fibrous fine-grained forms.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

4-5 - Fluorite-Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Garronite

Gladstone-Dale:

CI meas= -0.018 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2317,KPDmeas= 0.236,KC= 0.2319

Optical Data:

Biaxial (?), b=1.5-1.515

Calculated Properties of Garronite

Electron Density:

r_electron=2.22 gm/cc
note: r_Garronite=2.19 gm/cc.

Fermion Index

Fermion Index = 0.01029
Boson Index = 0.98971

Photoelectric:

PE_Garronite= 2.16 barns/electron
U=PE_Garronite x r_electron= 4.80 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Garronite is Not Radioactive

Garronite Classification

Dana Class:

77.1.3.3 (77)Tectosilicate Zeolite group

(77.1)true zeolites

(77.1.3)Gismondine and related species

77.1.3.1 Gismondine Ca2Al4Si4O16·9(H2O) P 2₁/c 2/m

77.1.3.2 Amicite K2Na2Al4Si4O16·5(H2O) I2 2

77.1.3.3 Garronite Na2Ca5Al12Si20O64·27(H2O) I 4₁/a 4/m

77.1.3.4 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn2₁ mm2

77.1.3.5 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6a Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.6b Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

77.1.3.8 Perlialite K8Tl4Al12Si24O72·20(H2O) P 6/mmm 6/m 2/m 2/m

77.1.3.9 Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

77.1.3.9a Paulingite-Na! (Na2,K2,Ca,Ba)5Al10Si35O90·45(H2O) Im3m 4/m 3 2/m

77.1.3.9b Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]·34(H2O) Im3m 4/m 3 2/m

77.1.3.10 Mazzite K2CaMg2(Al,Si)36O72·28(H2O) P 6₃/mmc 6/m 2/m 2/m

77.1.3.11 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m

77.1.3.12 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2

Strunz Class:

VIII/J.25-40 VIII - Silicates

VIII/J - Tectosilicates (network), with zeolite-structure, Bladed Zeolites

VIII/J.25 - Zeolite group, Amicite - Phillipsite - Yugawaralite series

VIII/J.25-10 Amicite K2Na2Al4Si4O16·5(H2O) I2 2

VIII/J.25-20 Gismondine Ca2Al4Si4O16·9(H2O) P 2₁/c 2/m

VIII/J.25-30 Gobbinsite (Na2,Ca)2K2Al6Si10O32·12(H2O) P mn2₁ mm2

VIII/J.25-40 Garronite Na2Ca5Al12Si20O64·27(H2O) I 4₁/a 4/m

VIII/J.25-50 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-55 Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-60 Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-70 Harmotome (Ba,Na,K)1-2(Si,Al)8O16·6(H2O) P 2₁/m 2/m

VIII/J.25-75 Montesommaite (K,Na)9Al9Si23O64·10(H2O) F dd2 mm2

VIII/J.25-80 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64·23(H2O) I mmm 2/m 2/m 2/m

VIII/J.25-90 Yugawaralite CaAl2Si6O16·4(H2O) Pc m

Other Garronite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

Search for Garronite using:

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

Visit our Advertisers for Garronite :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Garronite Mineral Data :

Ask about Garronite 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 Garronite Specimen Label here :

Garronite

Na2Ca5Al12Si20O64·27(H2O)
Dana No: 77.1.3.3 Strunz No: VIII/J.25-40
Locality:

Notes: