Sep 26 2013
The name Barioorthojoaquinite has been named based on its Barium content, its orthorhombic symmetry and its relation with the joaquinite mineral group.
Properties of Barioorthojoaquinite
The following are the key properties of barioorthojoaquinite:
- Cell Data
- Space Group : Ccmm or Cc2m or Ccm2
- a = 10.477(5)
- b = 9.599(1)
- c = 22.59(1)
- Z = [4]
- Crystal Data
- Orthorhombic
- Point Group: 2/m 2/m 2/m or mm2
- As pseudotetragonal crystals, steep bipyramidal {111} and truncated by {001}, to 8 mm; pyramidal faces are curved and striated; as aggregates
- X-ray Powder Pattern: 2.997 (100), 2.953 (95), 2.824 (90), 5.64 (70), 2.935 (70), 4.30 (62), 3.203 (50)
- Chemical Composition
| Elements |
Content 1 |
| SiO2 |
35.15 |
| TiO2 |
11.33 |
| Al2O3 |
0.57 |
| RE2O3 |
0.00 |
| FeO |
9.47 |
| MnO |
0.62 |
| CaO |
0.17 |
| SrO |
3.34 |
| BaO |
38.56 |
| Na2O |
0.12 |
| H2O |
1.3 |
| Total |
100.63 |
- Optical Properties
- Transparent to translucent
- Color: Yellow-brown
- Streak: pale yellow
- Luster: vitreous
- Optical Class: Biaxial (+)
- Pleochroism: X = very pale yellow; Y = pale yellow; Z = yellow
- Orientation: X = a ; Y = b ; Z = c
- Dispersion: r > v; strong
- Absorption: Z>>Y>X
- α = 1.735; β = 1.737; γ = 1.800
- 2V(measure) = 10°-15°
- Estimated Properties
| Electron density |
Bulk density (electron density) = 3.59 g/cm3
note: Specific gravity of barioorthojoaquinite = 3.85 g/cm3 |
| Photoelectric |
PEBarioorthojoaquinite = 109.31 barns/electron
U = PEBarioorthojoaquinite x ρ electron density = 392.68 barns/cm3 |
| Fermion index |
Fermion index = 0.06
Boson index = 0.94 |
|
Radioactivity
|
Barioorthojoaquinite is not radioactive. |
How to Identify Barioorthojoaquinite
The color of barioorthojoaquinite varies from yellow-brown and exhibits a hardness of 5.5.
Global Distribution
Barioorthojoaquinite is found at the Gem mine, San Benito Co in California, USA.
Occurrence of Barioorthojoaquinite and Useful Mineral Association
Barioorthojoaquinite occurs in a block of highly fractured basalt subjected to high pressure metamorphism and serpentinization. It is associated with minerals like benitoite, baotite, fresnoite and natrolite.
References