Xonotlite Mineral Data + Say XONOTLITE


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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 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 - PrismaticH-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),
Click Here for Large Xonotlite Structure Window Crystal Structure:

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Hejny C , Armbruster T , Zeitschrift fur Kristallographie , 216 (2001) p.396-408, Polytypism in xonotlite Ca6Si6O17(OH)2, Note: polytype derived from structure in Kudoh and Takeuchi (1979), Locality: model structure, not experimentally determined

View Additional jPOWD Structure files for Xonotlite
[1] [2] [3]
 

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 Diaphaniety: Diaphaniety: 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: Non-fluorescent.
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
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:

relectron=2.71 gm/cc
note: rXonotlite =2.71 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.01166
Boson Index = 0.98834
Help on Photoelectric: Photoelectric:

PEXonotlite = 5.02 barns/electron
U=PEXonotlite x relectron= 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: 66.3.1.1 (66)Inosilicate Double-Width Unbranched Chains, W=2
  (66.3)with chains P>2
  (66.3.1)P=3
 
66.3.1.1 Xonotlite Ca6Si6O17(OH)2 P 2/a 2/m
 
66.3.1.2 Zorite Na6Ti5[Si12O34](O,OH)5·11(H2O) C mmm 2/m 2/m 2/m
 
66.3.1.3 Eudidymite NaBeSi3O7(OH) C 2/c 2/m
 
66.3.1.4 Epididymite NaBeSi3O7(OH) Pnam 2/m 2/m 2/m
 
66.3.1.5 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
 
66.3.1.6 Haineaultite! (Na,Ca)5Ca(Ti,Nb)5(Si,S)12O34(OH,F)8·5(H2O) C 222 2 2 2
 
66.3.1.7 IMA2004-052! Ca3Ti5[(Si6O17)2|O(OH)4]·14(H2O) C mmm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: VIII/F.21-30 VIII - Silicates
  VIII/F - Inosilicates (chain and band) Triplet chains [Si6O15/17]6-/10- and modified triplet bands
  VIII/F.21 - Nekoite - Tacharanite series
 
VIII/F.21-10 Nekoite Ca3Si6O15·7(H2O) P1 1
 
VIII/F.21-20 Scawtite Ca7Si6(CO3)O18·2(H2O) C 2/m 2/m
 
VIII/F.21-30 Xonotlite Ca6Si6O17(OH)2 P 2/a 2/m
 
VIII/F.21-40 Tacharanite Ca12Al2Si18O33(OH)36 A centered Mono
 

Other Xonotlite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Xonotlite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 - Franklin Minerals(Dunn) 6 - Franklin Minerals(Palache) 7 -Google Images 8 -Google Scholar 9 -Handbook of Mineralogy (MinSocAm) 10 -Handbook of Mineralogy (UofA) 11 -MinDAT 12 -MinMax(Deutsch) 13 -MinMax(English) 14 -Mineralienatlas (Deutsch) 15 -QUT Mineral Atlas 16 - WWW-MINCRYST 17 -École des Mines de Paris

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Print or Cut-and-Paste your Xonotlite Specimen Label here :

Xonotlite

Ca6Si6O17(OH)2
Dana No: 66.3.1.1 Strunz No: VIII/F.21-30
Locality:

 

Notes:

 

 
   
 
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