Crandallite Mineral Data

Crandallite Mineral Data
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General Crandallite Information

Help on Chemical Formula: Chemical Formula: CaAl3(PO4)2(OH)5•(H2O)
Help on Composition: Composition: Molecular Weight = 414.02 gm
   Calcium      9.68 %  Ca   13.54 % CaO
   Aluminum    19.55 %  Al   36.94 % Al2O3
   Phosphorus  14.96 %  P    34.28 % P2O5
   Hydrogen     1.70 %  H    15.23 % H2O
   Oxygen      54.10 %  O
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaAl3(PO4)2(OH)5•(H2O)
Help on Environment: Environment: Lateritic phosphate deposits and alteration of pegmatitic phosphate minerals.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1917
Help on Locality: Locality: Brooklyn mine, near Silver City, Tintic district, Juab County, Utah, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Milan L. Crandall, Jr., engineer, Knight Syndicate, Provo, Utah, USA.
Help on Name Pronunciation: Name Pronunciation: Crandallite + Pronunciation Say CRANDALLITE
Help on Synonym: Synonym: Davisonite - mixture with apatite
  Deltaite - mixture with hydroxylapatite
  Dennisonite - Mixture with apatite
 

Crandallite Image

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Crandallite   Wardite

Comments: Sliced and polished slab of yellow to white mixture of wardite and crandallite.
Location: Clay Canyon, Fairfield, Utah Co., Utah, USA. Scale: 11x6x.6 cm.
© John Betts - Fine Minerals
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Crandallite   Phosphofibrite

Comments: Olive-green colored fibrous phosphofibrite aggregates with white crandallite.
Location: Silver Coin Mine, Humboldt County, Nevada, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Crandallite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:2.31149
Help on Cell Dimensions: Cell Dimensions: a = 7.005, c = 16.192, Z = 3; V = 688.09 Den(Calc)= 3.00
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.97(1), 2.18(0.45), 5.75(0.35),
Click Here for Large Crandallite Structure Window Crystal Structure:

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Blount A M , American Mineralogist , 59 (1974) p.41-47, The crystal structure of crandallite

 

Physical Properties of Crandallite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Gray, Yellow, Yellowish white, Light red.
Help on Density: Density: 2.78 - 2.92, Average = 2.84
Help on Diaphaneity: Diaphaneity: Transparent to Subtranslucent
Help on Habit: Habit: Compact - Occurs as a compact mass.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Dull
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Crandallite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.008 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2068,KPDmeas= 0.2177,KC= 0.2194
Ncalc = 1.61 - 1.66
Help on Optical Data: Optical Data: Uniaxial (+), w=1.618, e=1.623, bire=0.0050.
 

Calculated Properties of Crandallite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.86 gm/cc
note: Specific Gravity of Crandallite =2.85 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0003929295
Boson Index = 0.9996070705
Help on Photoelectric: Photoelectric: PECrandallite = 2.50 barns/electron
U=PECrandallite x rElectron Density= 7.15 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Crandallite is Not Radioactive
 

Crandallite Classification
Help on Dana Class: Dana Class: 42.07.03.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.07)where (AB)5 (XO4)3 Zq · x(H2O)
  (42.07.03)Crandallite Group
 
42.07.03.01 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.02 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
42.07.03.03 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.04 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
42.07.03.05 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
42.07.03.06 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
42.07.03.07 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
42.07.03.08 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
Help on Strunz Class: Strunz Class: 08.BL.10 08 - PHOSPHATES, ARSENATES, VANADATES
  08.B - Phosphates, etc. with Additional Anions, without H2O
  08.BL -With medium-sized and large cations, (OH, etc.):RO4 = 3:1
 
08.BL.10 Arsenogorceixite! BaAl3AsO3(OH)(AsO4,PO4)(OH,F)6 R 3m 3 2/m
 
08.BL.10 Arsenocrandallite (Ca,Sr)Al3[(As,P)O4]2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Ferrazite? (Pb,Ba)3(PO4)2•8(H2O)(?) Tri
 
08.BL.10 Arsenowaylandite* BiAl3(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Benauite! HSrFe3(PO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Arsenogoyazite (Sr,Ca,Ba)Al3(AsO4,PO4)2(OH,F)5•(H2O) R 3m 3 2/m
 
08.BL.10 Dussertite BaFe3(AsO4)2(OH)5 R 3m 3m
 
08.BL.10 Crandallite CaAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Goyazite SrAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Gorceixite BaAl3(PO4)(PO3OH)(OH)6 R 3m 3 2/m
 
08.BL.10 Kintoreite PbFe3(PO4)2(OH,H2O)6 R 3m 3 2/m
 
08.BL.10 Lusungite? (Sr,Pb)Fe3(PO4)2(OH)5•(H2O) R 3m 3m
 
08.BL.10 Philipsbornite PbAl3(AsO4)2(OH)5•(H2O) R 3m-,R 3m Trig
 
08.BL.10 Plumbogummite PbAl3(PO4)2(OH)5•(H2O) R 3m 3 2/m
 
08.BL.10 Segnitite PbFe3H(AsO4)2(OH)6 R 3m 3 2/m
 
08.BL.10 Springcreekite! BaV3(PO4)2(OH,H2O)6 R 3m 3 2/m
 

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

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Crandallite

CaAl3(PO4)2(OH)5•(H2O)
Dana No: 42.07.03.01 Strunz No: 08.BL.10
Locality:

 

Notes: