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Minyulite Mineral Data

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General Minyulite Information

Help on Chemical  Formula: Chemical Formula: KAl2(PO4)2(OH,F)•4(H2O)
Help on Composition: Composition: Molecular Weight = 372.57 gm
   Potassium   10.49 %  K    12.64 % K2O
   Aluminum    14.48 %  Al   27.37 % Al2O3
   Phosphorus  16.63 %  P    38.10 % P2O5
   Hydrogen     2.37 %  H    21.15 % H2O
   Oxygen      54.75 %  O
   Fluorine     1.27 %  F     1.27 % F
                 -   %   F    -0.54 % -O=F2    
              ______        ______ 
              100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KAl2(PO4)2(OH)0.75F0.25•4(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1933
Help on Locality: Locality: Minyulo Well in western Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Minyulite + Pronunciation Say MINYULITE
Help on Synonym: Synonym: ICSD 100036
  PDF 37-371

Minyulite Image

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Comments: Crystals of minyulite on matrix.
Location: St. John's Quarry, Kapunda, South Australia. Scale: Crystal size 4-5 mm to 5 mm.
© John Veevaert

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  Minyulite   Sincosite

Comments: Pale greenish white acicular radial sprays of minyulite to 8mm with small, green, tabular sincosite.
Location: Ross Hannibal mine, Lawrence County, South Dakota. Scale: Picture size 2 cm.
© Tom Loomis / Dakota Matrix

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  Aldermanite   Minyulite

Comments: White, blocky aldermanite crystals to 2mm completely covering one face of matrix with colorless prismatic Minyulite crystals in sprays to 3mm.
Location: Tom's Phosphate quarry, Kapunda, South Australia, Australia. Scale: Overall: 2 x 1.5 x 2 cm.
© Tom Loomis / Dakota Matrix

Minyulite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9586:1:0.5669
Help on Cell Dimensions: Cell Dimensions: a = 9.337, b = 9.74, c = 5.522, Z = 2; V = 502.18 Den(Calc)= 2.46
Help on Crystal System: Crystal System: Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pba2
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.38(1), 5.6(1), 6.8(0.6),

Physical Properties of Minyulite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Colorless, Green, White, Light green.
Help on Density: Density: 2.46
Help on Diaphaneity: Diaphaneity: Transparent
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: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Minyulite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.029 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.029 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2172,KPDmeas= 0.2172,KC= 0.2237
Ncalc = 1.55
Help on Optical Data: Optical Data: Biaxial (+), a=1.531, b=1.534, g=1.538, bire=0.0070, 2V(Calc)=82, 2V(Meas)=70.

Calculated Properties of Minyulite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.48 gm/cc
note: Specific Gravity of Minyulite =2.46 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002789568
Boson Index = 0.9997210432
Help on Photoelectric: Photoelectric: PEMinyulite = 2.30 barns/electron
U=PEMinyulite x relectron= 5.71 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 152.82 (Gamma Ray American Petroleum Institute Units)
Concentration of Minyulite per GRapi unit = 0.65 (%)

Estimated Radioactivity from Minyulite - barely detectable


Minyulite Classification

Help on  Dana Class: Dana Class: (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
  (42.11)where (AB)4 (XO4)3 Zq � x(H2O)
  (42.11.05)Dana Group Minyulite KAl2(PO4)2(OH,F)•4(H2O) Pba2 mm2
Help on  Strunz Class: Strunz Class: 08.DH.05 08 - PHOSPHATES, ARSENATES, VANADATES
  08.D - Phosphates, etc
  08.DH -With large and medium-sized cations, (OH, etc.):RO4 < 1:1
08.DH.05 Minyulite KAl2(PO4)2(OH,F)•4(H2O) Pba2 mm2

Other Minyulite Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Minyulite :
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

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Dana No: Strunz No: 08.DH.05





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