Apophyllite Mineral Data

Apophyllite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images       News Help About



Mineral of the Month Club - An Inexpensive Way to Enjoy Minerals


General Apophyllite Information

Help on Chemical Formula: Chemical Formula: KCa4(Si4O10)2F•8(H2O)
Help on Composition: Composition: Molecular Weight = 907.20 gm
   Potassium   4.31 %  K     5.19 % K2O
   Calcium    17.67 %  Ca   24.73 % CaO
   Silicon    24.77 %  Si   52.98 % SiO2
   Hydrogen    1.78 %  H    15.89 % H2O
   Oxygen     49.38 %  O
   Fluorine    2.09 %  F     2.09 % F
                -   %   F    -0.88 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KCa4(Si4O10)2F•8(H2O)
Help on Environment: Environment: Secondary mineral in basalts. Redefined as a group name for the fluor-, hydroxy- in 1978.
Help on IMA Status: IMA Status: Not Approved IMA 1978
Help on Locality: Locality: Lonault and Poona, southeast of Bombay, India. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named in 1800 from the Greek apophylliso - "it flakes off."
Help on Name Pronunciation: Name Pronunciation: Apophyllite + Pronunciation Say APOPHYLLITE
Help on Synonym: Synonym: ICSD 12108
  PDF 19-82
 

Apophyllite Image

Click Here for Larger Apophyllite Image in a New Browser Window Images:
Click Here for Larger Apophyllite Image

Apophyllite   Apophyllite-(KOH)   Stilbite-Ca

Comments: 3 cm. pink-colored rosette of stilbite and clear "apophyllite" (probably hydroxyapophyllite) in an amygdaloidal cavity.
Location: Aurangabad District, Jalgaon, India. Scale: Specimen size 6 cm.
© Dave Barthelmy
Click Here for Larger Apophyllite Image in a New Browser Window Images:
Click Here for Larger Apophyllite Image

Apophyllite   Apophyllite-(KF)   Stilbite-Ca

Comments: Doubly terminated, very clear and perfect fluorapophyllite with white stilbite.
Location: Jalgaon, India. Scale: 4 x 3.5 cm.
© Fabre Minerals
Click Here for Larger Apophyllite Image in a New Browser Window Images:
Click Here for Larger Apophyllite Image

Apophyllite   Apophyllite-(KOH)

Comments: Crystal cluster of tabular hydroxyapophyllite.
Location: Wessels Mine, Kalahari Manganese Field, Northern Cape Province, South Africa. Scale: 2.5 x 2.3 cm.
© John Veevaert
Click Here for Larger Apophyllite Image in a New Browser Window Images:
Click Here for Larger Apophyllite Image

Apophyllite   Kinoite

Comments: Crystals of dark blue kinoite and clear apophyllite.
Location: Christmas Mine, Gila County, Arizona, USA. Scale: Crystal size 2.5 mm.
© John Veevaert
Click Here for Larger Apophyllite Image in a New Browser Window Images:
Click Here for Larger Apophyllite Image

Apophyllite

Comments: Mint green to clear apophyllite flat top crystals in a circular stellate cluster on pink stilbite.
Location: Rahuri, Maharashtra State, India. Scale: Specimen size 10 cm.
© Kevin Ward

Apophyllite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.76116
Help on Cell Dimensions: Cell Dimensions: a = 8.96, c = 15.78, Z = 2; V = 1,266.84 Den(Calc)= 2.38
Help on Crystal System: Crystal System: Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4/mnc
 

Physical Properties of Apophyllite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: White, Pink, Green, Yellow, Violet.
Help on Density: Density: 2.3 - 2.4, Average = 2.34
Help on Diaphaneity: Diaphaneity: Transparent to translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Crystalline - Coarse - Occurs as well-formed coarse sized crystals.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Pseudo Cubic - Crystals show a cubic outline.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white
 

Optical Properties of Apophyllite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2252,KPDmeas= 0.2281,KC= 0.2273
Ncalc = 1.52 - 1.55
Help on Optical Data: Optical Data: Uniaxial (+), w=1.535, e=1.537, bire=0.0020.
 

Calculated Properties of Apophyllite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.38 gm/cc
note: Specific Gravity of Apophyllite =2.35 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEApophyllite = 3.56 barns/electron
U=PEApophyllite x relectron= 8.48 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 63.07 (Gamma Ray American Petroleum Institute Units)
Concentration of Apophyllite per GRapi unit = 1.59 (%)

Estimated Radioactivity from Apophyllite - barely detectable

 

Apophyllite Classification
Help on Dana Class: Dana Class: 72.03.01.00 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
  (72.03)with 3-, 4-, or 5-membered rings and 8-membered rings
  (72.03.01)Apophyllite group (4- & 8-membered rings)
 
72.03.01.00 Apophyllite* KCa4(Si4O10)2F•8(H2O) P 4/mnc 4/m 2/m 2/m
 
72.03.01.01 Apophyllite-(KF) (K,Na)Ca4Si8O20(F,OH)•8(H2O) P 4/mnc 4/m 2/m 2/m
 
72.03.01.02 Apophyllite-(KOH) KCa4Si8O20(OH,F)•8(H2O) P 4/mnc 4/m 2/m 2/m
 
72.03.01.03 Apophyllite-(NaF) NaCa4Si8O20F•8(H2O) Pnnm 2/m 2/m 2/m
 
72.03.01.04 Carletonite KNa4Ca4Si8O18(CO3)4(OH,F)•(H2O) P 4/mbm 4/m 2/m 2/m
Help on Strunz Class: Strunz Class: 09.EA.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
 
09.EA.15 Apophyllite* KCa4(Si4O10)2F•8(H2O) P 4/mnc 4/m 2/m 2/m
 
09.EA.15 Apophyllite-(KOH) KCa4Si8O20(OH,F)•8(H2O) P 4/mnc 4/m 2/m 2/m
 
09.EA.15 Apophyllite-(KF) (K,Na)Ca4Si8O20(F,OH)•8(H2O) P 4/mnc 4/m 2/m 2/m
 
09.EA.15 Apophyllite-(NaF) NaCa4Si8O20F•8(H2O) Pnnm 2/m 2/m 2/m
 

Other Apophyllite Information
Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Mason68) OPTIC PROP.(Mason68)
Help on See Also: See Also: Links to other databases for Apophyllite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - Franklin Minerals(Palache)
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - MinMax(Deutsch)
9 - MinMax(English)
10 - Mineralienatlas (Deutsch)
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Scandinavian mineral gallery
14 - Tradeshop.com - The Rainbow of Gems
15 - WWW-MINCRYST

Search for Apophyllite using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Apophyllite :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

Excalibur Minerals

Exceptional Minerals

Fabre Minerals

Heliodor

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Apophyllite Mineral Data :

Ask about Apophyllite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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

Apophyllite

KCa4(Si4O10)2F•8(H2O)
Dana No: 72.03.01.00 Strunz No: 09.EA.15
Locality:

 

Notes: