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Merlinoite Mineral Data

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General Merlinoite Information

Help on Chemical  Formula: Chemical Formula: (K,Ca,Na,Ba)7Si23Al9O64•23(H2O)
Help on Composition: Composition: Molecular Weight = 2,625.60 gm
   Potassium   6.25 %  K     7.53 % K2O
   Barium      2.09 %  Ba    2.34 % BaO
   Sodium      0.53 %  Na    0.71 % Na2O
   Calcium     2.29 %  Ca    3.20 % CaO
   Aluminum    9.56 %  Al   18.06 % Al2O3
   Iron        0.43 %  Fe    0.55 % FeO
   Silicon    24.28 %  Si   51.95 % SiO2
   Hydrogen    1.74 %  H    15.58 % H2O
   Oxygen     52.83 %  O
             ______        ______ 
             100.00 %       99.91 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K4.2Ca1.5Na0.6Ba0.4Fe2+0.2Si22.7Al9.3O64�22.7(H2O)
Help on Environment: Environment: A secondary mineral in veins and cavities of silica-undersaturated volcanic rocks and manganese nodules in the Indian Ocean.
Help on IMA Status: IMA Status: Approved IMA 1977
Help on Locality: Locality: In the Cupaello quarry, near Santa Rufina, and at Valle Beachella, Sacrofano, near Rome, Lazio,, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Stefano Merlino (1938-), Professor of Crystallography, University of Pisa, Pisa, Italy.
Help on Name Pronunciation: Name Pronunciation: Merlinoite + Pronunciation Say MERLINOITE
Help on Synonym: Synonym: ICSD 86741
  PDF 29-989

Merlinoite Image

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Comments: Colorless transparent prismatic merlinoite microcrystals in vug.
Location: Lagno Ahendo Lare, Vesuvius, Naples, Campania, Italy. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Merlinoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.992:1:0.6989
Help on Cell Dimensions: Cell Dimensions: a = 14.116, b = 14.229, c = 9.946, Z = 1; V = 1,997.72 Den(Calc)= 2.18
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I mmm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.18(1), 7.08(0.9), 7.12(0.9),

Physical Properties of Merlinoite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Colorless, White.
Help on Density: Density: 2.14 - 2.27, Average = 2.2
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Spherical - Spherical, rounded aggregates.
Help on Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Merlinoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.018 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2294,KPDmeas= 0.2268,KC= 0.2252
Ncalc = 1.48 - 1.51
Help on Optical Data: Optical Data: Biaxial (-), a=1.499, b=1.5, g=1.501, bire=0.0020, 2V(Calc)=88, 2V(Meas)=56. Dispersion r > v.

Calculated Properties of Merlinoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.22 gm/cc
note: Specific Gravity of Merlinoite =2.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMerlinoite = 10.61 barns/electron
U=PEMerlinoite x relectron= 23.55 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 90.85 (Gamma Ray American Petroleum Institute Units)
Concentration of Merlinoite per GRapi unit = 1.10 (%)

Estimated Radioactivity from Merlinoite - barely detectable


Merlinoite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.03)Gismondine and related species Gismondine Ca2Al4Si4O16•9(H2O) P 21/c 2/m Amicite K2Na2Al4Si4O16•5(H2O) I2 2 Garronite Na2Ca5Al12Si20O64•27(H2O) I 41/a 4/m Gobbinsite (Na2,Ca)2K2Al6Si10O32•12(H2O) P mn21 mm2 Harmotome (Ba,Na,K)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m Perlialite K8Tl4Al12Si24O72•20(H2O) P 6/mmm 6/m 2/m 2/m Paulingite-K (K2,Ca,Na2,Ba)5Al10Si35O90•45(H2O) Im3m 4/m 3 2/m Paulingite-Na! (Na2,K2,Ca,Ba)5Al10Si35O90•45(H2O) Im3m 4/m 3 2/m Paulingite-Ca! (Ca,K,Na,Ba)5[Al10Si35O84]•34(H2O) Im3m 4/m 3 2/m Mazzite-Mg K2CaMg2(Al,Si)36O72•28(H2O) P 63/mmc 6/m 2/m 2/m Mazzite-Na! Na8Al8Si28O72•30H2O P 63/mmc 6/m 2/m 2/m Merlinoite (K,Ca,Na,Ba)7Si23Al9O64•23(H2O) I mmm 2/m 2/m 2/m Montesommaite (K,Na)9Al9Si23O64•10(H2O) F dd2 mm2
Help on  Strunz Class: Strunz Class: 09.GC.15 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GC -Chains of doubly-connected 4-membered rings
09.GC.15 Merlinoite (K,Ca,Na,Ba)7Si23Al9O64•23(H2O) I mmm 2/m 2/m 2/m

Other Merlinoite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2)
Help on See Also: See Also: Links to other databases for Merlinoite :
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.GC.15





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