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Xonotlite Mineral Data

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General Xonotlite Information

Help on Chemical  Formula: Chemical Formula: Ca6Si6O17(OH)2
Help on Composition: Composition: Molecular Weight = 714.99 gm
   Calcium   33.63 %  Ca   47.06 % CaO
   Silicon   23.57 %  Si   50.42 % SiO2
   Hydrogen   0.28 %  H     2.52 % H2O
   Oxygen    42.52 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca6Si6O17(OH)2
Help on Environment: Environment: Veinlets in serpentine or contact zones.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1866
Help on Locality: Locality: Tetela de Xonotla, Puebla, Mexico. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Xonotlite + Pronunciation Say XONOTLITE
Help on Synonym: Synonym: Eakleite
  ICSD 20702
  Jurupaite
  PDF 23-125
 

Xonotlite Image

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  Xonotlite

Comments: Tufts of hair-like Xonotlite crystals on datolite rich matrix.
Location: Kalahari Manganese Field, Kuruman Hills, Cape Province, South Africa. Scale: 5.5 x 3.7 cm.
© John Veevaert

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  Xonotlite

Comments: White fibrous crystals of xonotlite to 1mm in a vug.
Location: Christmas mine, Gila Co., Arizona, United States. Scale: Picture size 5 mm.
© Tom Loomis / Dakota Matrix

Xonotlite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =4.6299:1:1.9051
Help on Cell Dimensions: Cell Dimensions: a = 17.029, b = 3.678, c = 7.007, Z = 1; beta = 90.34° V = 438.86 Den(Calc)= 2.71
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.085(1), 2.828(0.5), 2.697(0.4),
 

Physical Properties of Xonotlite

Help on Cleavage: Cleavage: {???} Good
Help on Color: Color: Colorless, Gray, Lemon white, Light gray, Pink.
Help on Density: Density: 2.7
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Tough - Difficult to break apart as shown by fibrous minerals and most metals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luminescence: Luminescence: Fluorescent, Short UV=weak gray-white, Long UV=weak white.
Help on Luster: Luster: Vitreous - Silky
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Xonotlite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.022 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2169,KPDmeas= 0.2177,KC= 0.2123
Ncalc = 1.57 - 1.58
Help on Optical Data: Optical Data: Biaxial (+), a=1.583, b=1.585, g=1.595, bire=0.0120, 2V(Calc)=50, 2V(Meas)=0-5. Dispersion small.
 

Calculated Properties of Xonotlite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.71 gm/cc
note: Specific Gravity of Xonotlite =2.71 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEXonotlite = 5.02 barns/electron
U=PEXonotlite x rElectron Density= 13.62 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Xonotlite is Not Radioactive
 

Xonotlite Classification

Help on  Dana Class: Dana Class: 66.03.01.01 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.03)with chains P>2
  (66.03.01)P=3
 
66.03.01.01 Xonotlite Ca6Si6O17(OH)2 P 2/a 2/m
 
66.03.01.02 Zorite Na6Ti5[Si12O34](O,OH)5•11(H2O) C mmm 2/m 2/m 2/m
 
66.03.01.03 Eudidymite NaBeSi3O7(OH) C 2/c 2/m
 
66.03.01.04 Epididymite NaBeSi3O7(OH) Pnam 2/m 2/m 2/m
 
66.03.01.05 Yuksporite (Sr,Ba)2K4(Ca,Na)14([],Mn,Fe){(Ti,Nb)4(O,OH)4[Si6O17]2[Si2O7]3}(H2O,OH)n,n~3 P 21/m 2/m
 
66.03.01.06 Haineaultite! (Na,Ca)5Ca(Ti,Nb)5(Si,S)12O34(OH,F)8•5(H2O) C 222 2 2 2
 
66.03.01.07 Chivruaiite! Ca4(Ti,Nb)5[(Si6O17)2[(OH,O)5]•13-14H2O C mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.DG.35 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DG -Inosilicates with 3-periodic single and multiple chains
 
09.DG.35 Xonotlite Ca6Si6O17(OH)2 P 2/a 2/m
 

Other Xonotlite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Collectors Book of Fluorescent Minerals) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Xonotlite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - Franklin Minerals(Palache)
7 - GeoScienceWorld
8 - Google Images
9 - Google Scholar
10 - Handbook of Mineralogy (MinSocAm)
11 - Handbook of Mineralogy (UofA)
12 - MinDAT
13 - Mineralienatlas (Deutsch)
14 - Online Mineral Museum
15 - QUT Mineral Atlas
16 - Ruff.Info
17 - WWW-MINCRYST

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Xonotlite

Ca6Si6O17(OH)2
Dana No: 66.03.01.01 Strunz No: 09.DG.35
Locality:

 

Notes:

 

 
   
 


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