General Frankhawthorneite Information
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Chemical Formula: |
Cu2Te++++++O4(OH)2 |
Composition: |
Molecular Weight = 352.70 gm |
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Copper 36.03 % Cu 45.11 % CuO |
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Tellurium 36.18 % Te 45.25 % TeO2 |
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Hydrogen 0.57 % H 5.11 % H2O |
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Oxygen 27.22 % O |
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______ ______ |
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100.00 % 95.46 % = TOTAL OXIDE |
Empirical Formula: |
Cu2(TeO4)(OH)2 |
Environment: |
Isolated crystals or groups on drusey quartz. Formed from the oxidation of primary Cu-Te-bearing sulfides. |
IMA Status: |
Approved IMA 1995 |
Locality: |
The Centennial Eureka mine, Juab County, Utah, USA. Link to MinDat.org Location Data. |
Name Origin: |
Named after Prof. Frank Christopher Hawthorne (1946-), University of Manitoba, Winnipeg, Canada. |
Synonym: |
ICSD 81607 |
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IMA1993-047 |
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PDF 49-1863 |
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Frankhawthorneite Image |
Images:
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Frankhawthorneite
Comments: Very small green crystals of frankhawthorneite on a light green unknown mineral.
Location: Centennial Eureka Mine, Tintic District, Juab Co., Utah, USA.
Scale: Picture size 1 mm.
© Thomas Witzke / Abraxas-Verlag |
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Frankhawthorneite Crystallography
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Axial Ratios: |
a:b:c =1.747:1:0.8843 |
Cell Dimensions: |
a = 9.095, b = 5.206, c = 4.604, Z = 2; beta = 98.115° V = 215.81 Den(Calc)= 5.43 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/n |
X Ray Diffraction: |
By Intensity(I/Io): 2.598(1), 2.891(0.7), 4.337(0.6), |
Forms:
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Crystal Structure:
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Grice J D , Roberts A C , The Canadian Mineralogist , 33 (1995) p.649-653, Frankhawthorneite, a unique HCP framework structure of a cupric tellurate
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Physical Properties of Frankhawthorneite
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Cleavage: |
None |
Color: |
Medium leaf green. |
Density: |
5.44 |
Diaphaniety: |
Transparent |
Fracture: |
Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern. |
Habit: |
Bladed - Aggregates of thin lath-like crystals (e.g. kyanite). |
Habit: |
Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). |
Hardness: |
3-3.5 - Calcite-Copper Penny |
Luminescence: |
Non-fluorescent. |
Luster: |
Vitreous (Glassy) |
Streak: |
light leaf green |
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Optical Properties of Frankhawthorneite
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Gladstone-Dale: |
CI meas= 0.006 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1842,KPDmeas= 0.1838,KC= 0.185 |
Optical Data: |
Biaxial (?), b=2 |
RL Anisotrophism: |
Weak, somber brown. |
RL Bireflectance: |
Weak. |
RL Color: |
Pale gray with viridian-green internal reflections. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Frankhawthorneite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
12.60 |
14.20 |

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| 420 nm |
12.30 |
13.70 |

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| 440 nm |
12.00 |
13.30 |

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| 460 nm |
11.70 |
12.90 |

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| 480 nm |
11.40 |
12.60 |

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| 500 nm |
11.20 |
12.40 |

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| 520 nm |
11.00 |
12.20 |

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| 540 nm |
10.90 |
12.00 |

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| 560 nm |
10.70 |
11.90 |

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| 580 nm |
10.60 |
11.70 |

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| 600 nm |
10.50 |
11.60 |

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| 620 nm |
10.40 |
11.40 |

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| 640 nm |
10.30 |
11.30 |

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| 660 nm |
10.20 |
11.20 |

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| 680 nm |
10.10 |
11.20 |

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| 700 nm |
10.10 |
11.20 |

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Calculated Relative Intensity Colors of Frankhawthorneite in Air
Relative Intensity |
0% |
90% |
100% |
180% |
270% |
360% |
450% |
540% |
630% |
720% |
810% |
830% |
| R1 |
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| R2 |
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Calculated Properties of Frankhawthorneite
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Electron Density: |
relectron=4.93 gm/cc note: rFrankhawthorneite =5.43 gm/cc. |
Fermion Index |
Fermion Index = 0.02903 Boson Index = 0.97097 |
Photoelectric: |
PEFrankhawthorneite = 139.10 barns/electron U=PEFrankhawthorneite x relectron= 685.30 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Frankhawthorneite is Not Radioactive |
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Frankhawthorneite Classification
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Dana Class: |
33.1.4.1 (33)Selenates and Tellurates |
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(33.1)as A+ (B++)m XO4 Zq |
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(33.1.4)Dana Group |
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33.1.4.1 Frankhawthorneite Cu2TeO4(OH)2 P 21/n 2/m |
Strunz Class: |
IV/K.15-10 IV - Oxides |
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IV/K - Complex Tellurides with [TeO6]6-, [TeO3]2- and [TeO4]2- groups |
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IV/K.15 - Yafsoanite - Cuzticite series |
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IV/K.15-10 Frankhawthorneite Cu2TeO4(OH)2 P 21/n 2/m |
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IV/K.15-12 Xocomecatlite Cu3TeO4(OH)4 Unk Ortho |
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IV/K.15-15 Mcalpineite Cu3TeO6·(H2O) Unk Cubic |
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IV/K.15-16 Jensenite Cu3TeO6·2(H2O) P 21/n 2/m |
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IV/K.15-18 Leisingite! Cu(Mg,Cu,Fe,Zn)2TeO6·6(H2O) P 31m 3 2/m |
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IV/K.15-19 Utahite! Cu5Zn3(TeO4)4(OH)8·7(H2O) P1 or P1 Tri |
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IV/K.15-20 Cuzticite Fe2TeO6·3(H2O) Unk Hex |
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IV/K.15-30 Yafsoanite Ca3Te2Zn3O12 I a3d 4/m 3 2/m |
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IV/K.15-40 Khinite PbCu3TeO6(OH)2 F ddd 2/m 2/m 2/m |
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IV/K.15-50 Parakhinite Cu3PbTeO4(OH)6 P 6222 or P 6422 6 2 2 |
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IV/K.15-60 Montanite Bi2TeO6·2(H2O) Mono |
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Other Frankhawthorneite Information
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References: |
NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(AntBidBlaNic5, Am.Min.,Vol.81,1996) |
See Also: |
Links to other databases for Frankhawthorneite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 - WWW-MINCRYST
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Print or Cut-and-Paste your Frankhawthorneite Specimen Label here :
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Frankhawthorneite
Cu2Te++++++O4(OH)2
Dana No: 33.1.4.1 Strunz No: IV/K.15-10
Locality:
Notes:
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