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Minehillite Mineral Data

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General Minehillite Information

Help on Chemical  Formula: Chemical Formula: (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16
Help on Composition: Composition: Molecular Weight = 4,786.44 gm
   Potassium   1.55 %  K     1.87 % K2O
   Sodium      0.14 %  Na    0.19 % Na2O
   Calcium    23.03 %  Ca   32.22 % CaO
   Magnesium   0.05 %  Mg    0.08 % MgO
   Manganese   0.11 %  Mn    0.15 % MnO
   Aluminum    2.48 %  Al    4.69 % Al2O3
   Zinc        6.56 %  Zn    8.16 % ZnO
   Iron        0.12 %  Fe    0.15 % FeO
   Silicon    23.12 %  Si   49.46 % SiO2
   Hydrogen    0.32 %  H     2.86 % H2O
   Oxygen     42.52 %  O
             ______        ______ 
             100.00 %       99.83 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K1.9Na0.3Fe2+0.1Mg0.1Mn2+0.1Ca27.5Zn4.8Al4.4Si39.4O112(OH)15.2
Help on Environment: Environment: Secondary low-temperature mineral found in a metamorphosed stratiform zinc deposit.
Help on IMA Status: IMA Status: Approved IMA 1984
Help on Locality: Locality: Mine Hill at Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the locality.
Help on Name Pronunciation: Name Pronunciation: Minehillite + Pronunciation Say MINEHILLITE
Help on Synonym: Synonym: ICSD 79739
  PDF 38-371

Minehillite Image

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  Minehillite   Margarosanite   Wollastonite-1A

Comments: White pearly crystalline minehillite with white margarosanite and dark gray lead, in pale pink opaque wollastonite (distinguished by blue-white fluorescence).
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Minehillite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:3.40523
Help on Cell Dimensions: Cell Dimensions: a = 9.777, c = 33.293, Z = 1; V = 2,756.10 Den(Calc)= 2.88
Help on Crystal System: Crystal System: Hexagonal Space Group: P 63/mmm, P 62c, or P 63mc
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.764(1), 1.847(0.9), 16.1(0.7),

Physical Properties of Minehillite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: Colorless, Gray white, Grayish black, White.
Help on Density: Density: 2.93
Help on Diaphaneity: Diaphaneity: Transparent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Hardness: Hardness: 4 - Fluorite
Help on Luminescence: Luminescence: Fluorescent, Short UV=dull violet, Long UV=dull violet.
Help on Luster: Luster: Vitreous - Pearly
Help on Streak: Streak: white

Optical Properties of Minehillite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2102,KPDmeas= 0.2067,KC= 0.2076
Ncalc = 1.6 - 1.61
Help on Optical Data: Optical Data: Uniaxial (-), e=1.604, w=1.607, bire=0.0030.

Calculated Properties of Minehillite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Minehillite =2.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEMinehillite = 7.17 barns/electron
U=PEMinehillite x relectron= 20.91 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 22.27 (Gamma Ray American Petroleum Institute Units)
Concentration of Minehillite per GRapi unit = 4.49 (%)

Estimated Radioactivity from Minehillite - barely detectable


Minehillite Classification

Help on  Dana Class: Dana Class: 73.02.02b.01 (73)Phyllosilicate Condensed Tetrahedral Sheets
  (73.02)with double and single layers
  (73.02.02b)Reyerite group (Minehillite Subgroup)
73.02.02b.01 Minehillite (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16 P 63/mmm, P 62c, or P 63mc Hex
73.02.02b.02 Orlymanite Ca4Mn3Si8O20(OH)6•2(H2O) P 3-,P 3 Trig
Help on  Strunz Class: Strunz Class: 09.EE.75 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EE -Single tetrahedral nets of 6-membered rings
09.EE.75 Minehillite (K,Na)2-3Ca28(Zn4Al4Si40)O112(OH)16 P 63/mmm, P 62c, or P 63mc Hex

Other Minehillite Information

Help on References: References: NAME( AntBidBlaNic2) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Minehillite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: 73.02.02b.01 Strunz No: 09.EE.75





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