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Direnzoite Mineral Data

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General Direnzoite Information

Help on Chemical  Formula: Chemical Formula: NaK6MgCa2(Al13Si47O120)•36H2O
Help on Composition: Composition: Molecular Weight = 4,597.25 gm
   Potassium   4.02 %  K     4.85 % K2O
   Barium      0.03 %  Ba    0.03 % BaO
   Sodium      0.56 %  Na    0.75 % Na2O
   Strontium   0.06 %  Sr    0.07 % SrO
   Calcium     1.89 %  Ca    2.65 % CaO
   Magnesium   0.82 %  Mg    1.37 % MgO
   Aluminum    7.86 %  Al   14.86 % Al2O3
   Iron        0.18 %  Fe    0.23 % FeO
   Silicon    28.70 %  Si   61.40 % SiO2
   Hydrogen    1.58 %  H    14.10 % H2O
   Oxygen     54.29 %  O
             ______        ______ 
             100.00 %      100.31 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Na1.12K4.73Mg1.56Ca2.17Fe2+0.15Sr0.03Ba0.01Al13.4Si46.98O120�35.99(H2O)
Help on Environment: Environment: Inside the cavities of a piece of xenolith rock incorporated by alkaline volcanic rocks, Zeolite group
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Mont Peylenc, near the town of St. Pierre Eynac, Massif Central, France Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Francesco Di Renzo (b1954), Research Director at the Laboratoire de Materiaux Catalytiques et Catalyse en Chimie Organique, Ecole Nationale Superieure de Chimie de Montpel lier (France),
Help on Synonym: Synonym: IMA2006-044

Direnzoite Image

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Comments: A fragment of the original piece of xenolith that containes direnzoite specimen. AmMin v93:96.
Location: Massif Central (France). Scale: Sample size 4 cm.
© American Mineralogist

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Comments: SEM micrograph of direnzoite showing the internal radial fiberous structure of the nodule. (AmMin, v93:97.
Location: Massif Central (France). Scale: See Image.
© American Mineralogist

Direnzoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4164:1:1.4369
Help on Cell Dimensions: Cell Dimensions: a = 7.5789, b = 18.201, c = 26.1539, Z = 1; V = 3,607.76 Den(Calc)= 2.12
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pmmn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.182(1), 3.484(0.71), 9.077(0.604),3.269(0.55), 2.907(0.48), 3.549(0.47), 4.234(0.44), 7.846(0.41),

Physical Properties of Direnzoite

Help on Cleavage: Cleavage: {010} Distinct
Help on Color: Color: White.
Help on Density: Density: 2.12
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Brittle - Splintery - Brittle fracture leaving splintery fragments.
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 Hardness: Hardness: 4.5 - Between Fluorite and Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Direnzoite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2278,KPDmeas= 0.2278,KC= 0.2262
Ncalc = 1.48
Help on Optical Data: Optical Data: Biaxial (?), a=1.483, b=1.483, g=1.483, bire=0.0000

Calculated Properties of Direnzoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.14 gm/cc
note: Specific Gravity of Direnzoite =2.12 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEDirenzoite = 2.25 barns/electron
U=PEDirenzoite x relectron= 4.81 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 58.63 (Gamma Ray American Petroleum Institute Units)
Concentration of Direnzoite per GRapi unit = 1.71 (%)

Estimated Radioactivity from Direnzoite - barely detectable


Direnzoite Classification

Help on  Dana Class: Dana Class: (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.06)Mordenite and related species Mordenite (Ca,Na2,K2)Al2Si10O24•7(H2O) C mc21 mm2 Epistilbite CaAl2Si6O16•5(H2O) C1 1 Maricopaite Pb7Ca2(Si,Al)48O100•32(H2O) Cm2m 2/m 2/m 2/m Dachiardite-Ca (Ca,Na2,K2)5Al10Si38O96•25(H2O) C 2/m 2/m Dachiardite-Na (Na2,Ca,K2)4Al4Si20O48•13(H2O) C 2/m 2/m Ferrierite-Mg (Mg,Na,K)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m Ferrierite-K! (K,Na)2Mg(Si,Al)18O36•9(H2O) Pnnm 2/m 2/m 2/m Ferrierite-Na! (Na,K)2Mg(Si,Al)18O36•9(H2O) P 21/n 2/m Boggsite NaCa2(Al5Si19O48)•17(H2O) I mma 2/m 2/m 2/m Gottardiite! Na3Mg3Ca5Al19Si117O272•93(H2O) C mca 2/m 2/m 2/m Terranovaite! (Na,Ca)8(Si68Al12)O160•29(H2O) C mcm 2/m 2/m 2/m Mutinaite! Na3Ca4Si85Al11O192•60(H2O) P nma 2/m 2/m 2/m Direnzoite! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.GF.55 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GF -Other Rare Zeolites
09.GF.55 Direnzoite! NaK6MgCa2(Al13Si47O120)•36H2O Pmmn 2/m 2/m 2/m

Other Direnzoite Information

Help on References: References: NAME( AmMin, v93:95) PHYS. PROP.(AmMin, v93:95) OPTIC PROP.(AmMin, v93:95)
Help on See Also: See Also: Links to other databases for Direnzoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.GF.55





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