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Harmotome Mineral Data

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General Harmotome Information

Help on Chemical  Formula: Chemical Formula: (Ba,Na,K)1-2(Si,Al)8O16•6(H2O)
Help on Composition: Composition: Molecular Weight = 704.93 gm
   Potassium   0.55 %  K     0.67 % K2O
   Barium     15.58 %  Ba   17.40 % BaO
   Sodium      0.65 %  Na    0.88 % Na2O
   Aluminum    7.66 %  Al   14.46 % Al2O3
   Silicon    23.91 %  Si   51.14 % SiO2
   Hydrogen    1.72 %  H    15.33 % H2O
   Oxygen     49.93 %  O
             ______        ______ 
             100.00 %       99.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ba0.8Na0.2K0.1Al2Si6O16•6(H2O)
Help on Environment: Environment: Alteration product of basalt and similar eruptive rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1801
Help on Locality: Locality: Bodenmais in Bavaria, Germany. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek harmos - "I combine" and temseis - "I cut" alluding to the fact that the pyramid divides parallel to the plane that passes through the terminal edges.
Help on Name Pronunciation: Name Pronunciation: Harmotome + Pronunciation Say HARMOTOME
Help on Synonym: Synonym: Andreasbergolite
  ICSD 15460
  PDF 39-1377
  Wellsite - Ca bearing

Harmotome Image

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Comments: Root beer colored calcite covered with harmotome crystals from 1 mm to 1 cm.
Location: Strontian Hills, Strontian, Argyll, Scotland. Scale: 5.5 x 4.5 cm.
© John Veevaert

Harmotome Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.6987:1:0.6148
Help on Cell Dimensions: Cell Dimensions: a = 9.879, b = 14.139, c = 8.693, Z = 2; beta = 55.166° V = 996.65 Den(Calc)= 2.35
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.67(1), 2.7(1), 3.12(1),

Physical Properties of Harmotome

Help on Cleavage: Cleavage: {010} Good, {001} Fair
Help on Color: Color: White, Gray, Yellow, Red, Brown.
Help on Density: Density: 2.44 - 2.5, Average = 2.46
Help on Diaphaneity: Diaphaneity: Subtransparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Cruciform - Twinned tabular crystals with a cross-like outline.
Help on Habit: Habit: Striated - Parallel lines on crystal surface or cleavage face.
Help on Habit: Habit: Twinning Common - Crystals are usually twinned.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Harmotome

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.215,KPDmeas= 0.2046,KC= 0.2137
Ncalc = 1.5 - 1.53
Help on Optical Data: Optical Data: Biaxial (+), a=1.503, b=1.505, g=1.508, bire=0.0050, 2V(Calc)=80, 2V(Meas)=43. Dispersion none.

Calculated Properties of Harmotome

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.31 gm/cc
note: Specific Gravity of Harmotome =2.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEHarmotome = 64.75 barns/electron
U=PEHarmotome x relectron= 149.76 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 7.87 (Gamma Ray American Petroleum Institute Units)
Concentration of Harmotome per GRapi unit = 12.70 (%)

Estimated Radioactivity from Harmotome - barely detectable


Harmotome 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.10 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GC -Chains of doubly-connected 4-membered rings
09.GC.10 Harmotome (Ba,Na,K)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
09.GC.10 Phillipsite-Na (Na,K,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
09.GC.10 Phillipsite-Ca! (Ca,K,Na)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m
09.GC.10 Phillipsite-K! (K,Na,Ca)1-2(Si,Al)8O16•6(H2O) P 21/m 2/m

Other Harmotome Information

Help on References: References: NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Harmotome :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - MinDAT
14 - Mineralienatlas (Deutsch)
15 - Online Mineral Museum
16 - QUT Mineral Atlas
17 - Ruff.Info

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Dana No: Strunz No: 09.GC.10





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