Mineralogy Database

Henmilite Mineral Data

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General Henmilite Information

Help on Chemical  Formula: Chemical Formula: Ca2Cu[B(OH)4]2(OH)4
Help on Composition: Composition: Molecular Weight = 369.41 gm
   Calcium   21.70 %  Ca   30.36 % CaO
   Copper    17.20 %  Cu   21.53 % CuO
   Boron      5.85 %  B    18.85 % B2O3
   Hydrogen   3.27 %  H    29.26 % H2O
   Oxygen    51.97 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2CuB2(OH)12
Help on Environment: Environment: In borate veins cutting contact-metasomatized marble.
Help on IMA Status: IMA Status: Approved IMA 1986
Help on Locality: Locality: Fuka mine, Okayama, Prefecture, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Kitinosuke Henmi (1919-1997) and his daughter Chiyoko Henmi (1949-) for their work on the Skarn deposit at Fuka, Japan.
Help on Name Pronunciation: Name Pronunciation: Henmilite + Pronunciation Say HENMILITE
Help on Synonym: Synonym: ICSD 202148
  PDF 40-481

Henmilite Image

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Comments: Blue crystals of henmilite in matrix.
Location: Fuka Mine, Bitchu-Cho, Okayama Prefecture, Chugoku Region, Honshu Island, Japan. Scale: Crystal size 3 mm.
© John Veevaert

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  Olshanskyite   Henmilite

Comments: Milky white olshanskyite hosting crystals of deep blue henmilite to 6 mm across.
Location: Fuka Mine, Bicchu Town, Kawakama Co., Okayama Pref., Japan. Scale: Crystal size 6 mm.
© John Veevaert

Henmilite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7222:1:0.7081
Help on Cell Dimensions: Cell Dimensions: a = 5.7617, b = 7.9774, c = 5.6488, Z = 1; alpha = 109.611°, beta = 91.473°, gamma = 83.686° V = 243.01 Den(Calc)= 2.52
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 5.25(1), 4.35(0.5), 3.709(0.4),

Physical Properties of Henmilite

Help on Color: Color: Bluish violet.
Help on Density: Density: 2.51
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Fragile - Crystals with a delicate and easily injured structure.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: pale violet

Optical Properties of Henmilite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2392,KPDmeas= 0.2401,KC= 0.2404
Ncalc = 1.6 - 1.61
Help on Optical Data: Optical Data: Biaxial (-), a=1.585, b=1.608, g=1.615, bire=0.0300, 2V(Calc)=56, 2V(Meas)=58.
Help on Pleochroism (x): Pleochroism (x): pale pink.
Help on Pleochroism (y): Pleochroism (y): pale purple.
Help on Pleochroism (z): Pleochroism (z): pale blue.

Calculated Properties of Henmilite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.54 gm/cc
note: Specific Gravity of Henmilite =2.51 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHenmilite = 9.95 barns/electron
U=PEHenmilite x rElectron Density= 25.27 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Henmilite is Not Radioactive

Henmilite Classification

Help on  Dana Class: Dana Class: (26)Hydrated Borates Containing Hydroxyl or Halogen
  (26.01)Dana Type
  (26.01.05)Dana Group Henmilite Ca2Cu[B(OH)4]2(OH)4 P1 1
Help on  Strunz Class: Strunz Class: 06.AC.30 06 - BORATES
  06.A - Monoborates
  06.AC -B(O,OH)4, without and with additional anions; 1(T), 1(T)+OH, etc.
06.AC.30 Henmilite Ca2Cu[B(OH)4]2(OH)4 P1 1

Other Henmilite Information

Help on References: References: NAME( AntBidBlaNic5) PHYS. PROP.(Am.Min.,Vol.71,p1234-1239,1986) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Henmilite :
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: 06.AC.30





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