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Jichengite
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Formula:
3CuIr2S4 · (Ni,Fe)9S8
Colour:
Steel grey
Lustre:
Metallic
Hardness:
4½
Specific Gravity:
7.003 (Calculated)
Crystal System:
Trigonal
This page provides mineralogical data about Jichengite.
Unique Identifiers
Mindat ID:
46975
Long-form identifier:
mindat:1:1:46975:9
IMA Classification of Jichengite
IMA status notes:
Rejected by the IMA, Published without approval
Physical Properties of Jichengite
Metallic
Transparency:
Opaque
Colour:
Steel grey
Streak:
Black
Hardness:
4½ on Mohs scale
Tenacity:
Brittle
Fracture:
None observed
Density:
7.003 g/cm3 (Calculated)
Comment:
Density could not be measured because of its too small grain size
Optical Data of Jichengite
Anisotropism:
Distinct grayish or yellowish white in crossed nicols and bluish violet-copper red in uncrossed nicols
Bireflectance:
Strong
Reflectivity:
| Wavelength | R1 (%) | R2 (%) |
|---|---|---|
| 400nm | 38.2% | 34.8% |
| 410nm | 38.5% | 34.7% |
| 420nm | 38.6% | 34.6% |
| 430nm | 38.7% | 34.4% |
| 440nm | 38.8% | 34.4% |
| 450nm | 38.9% | 34.4% |
| 460nm | 38.9% | 34.4% |
| 470nm | 38.9% | 34.3% |
| 480nm | 38.9% | 34.3% |
| 490nm | 38.9% | 34.3% |
| 500nm | 38.9% | 34.2% |
| 510nm | 38.9% | 34.2% |
| 520nm | 38.9% | 34.2% |
| 530nm | 38.9% | 34.4% |
| 540nm | 38.9% | 34.4% |
| 546nm | 38.9% | 34.5% |
| 550nm | 38.9% | 34.5% |
| 570nm | 39.0% | 34.8% |
| 589nm | 39.1% | 35.3% |
| 590nm | 39.1% | 35.4% |
| 600nm | 39.1% | 35.5% |
| 610nm | 39.2% | 35.7% |
| 620nm | 39.2% | 36.0% |
| 630nm | 39.2% | 36.5% |
| 640nm | 39.2% | 36.5% |
| 650nm | 39.2% | 36.8% |
| 660nm | 39.2% | 36.8% |
| 670nm | 39.3% | 37.2% |
| 680nm | 39.4% | 37.5% |
| 690nm | 39.5% | 37.8% |
| 700nm | 39.8% | 38.0% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 39.8%.
R1 shown in black, R2 shown in red
Colour in reflected light:
Reddish-brown, without internal reflections
Pleochroism:
Weak
Chemistry of Jichengite
Mindat Formula:
3CuIr2S4 · (Ni,Fe)9S8
Element Weights:
Crystallography of Jichengite
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3m
Setting:
R3m
Cell Parameters:
a = 7.0745(14) Å, c = 34.267(10) Å
Ratio:
a:c = 1 : 4.844
Unit Cell V:
1,485.25 ų (Calculated from Unit Cell)
Morphology:
Massive or granular aggregates.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.41 Å | (30) |
| 6.01 Å | (15) |
| 5.70 Å | (10) |
| 4.98 Å | (8) |
| 4.56 Å | (6) |
| 3.80 Å | (7) |
| 3.51 Å | (10) |
| 3.31 Å | (20) |
| 3.15 Å | (70) |
| 3.004 Å | (100) |
| 2.88 Å | (32) |
| 2.857 Å | (5) |
| 2.830 Å | (6) |
| 2.59 Å | (50) |
| 2.48 Å | (10) |
| 2.28 Å | (30) |
| 2.18 Å | (30) |
| 2.08 Å | (12) |
| 2.00 Å | (5) |
| 1.916 Å | (40) |
| 1.902 Å | (10) |
| 1.765 Å | (60) |
| 1.753 Å | (50) |
| 1.685 Å | (20) |
| 1.660 Å | (10) |
| 1.525 Å | (10) |
| 1.500 Å | (10) |
| 1.428 Å | (7) |
| 1.249 Å | (15) |
| 1.200 Å | (6) |
| 1.153 Å | (5) |
| 1.115 Å | (15) |
| 1.087 Å | (15) |
Comments:
Measured data
Synonyms of Jichengite
Other Information
Notes:
Weakly magnetic
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Jichengite
mindat.org URL:
https://www.mindat.org/min-46975.html
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