Samsonite

• Named after its type locality, the Samson Vein of Andreasberg silver mines, Harz Mountains, Germany.
• Formula: Ag₄MnSb₂S₆
• Space group: P2₁/n (No. 14)
• Crystal system: monoclinic
• Crystal class: 2/m
• Lattice parameters: a = 10.3861 Å, b = 8.1108 Å, c = 6.6630 Å, α = γ = 90°, β = 92.639°

 

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Picture: Christian Rewitzer  | CC BY-SA-3.0

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Crystal structure (click on the picture to download the VESTA file):

(K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,”J. Appl. Crystallogr., 44, 1272-1276 (2011).)

• MnO₆ octahedra (purple)
• SbS₃ trigonal pyramids (blue)
• AgS₄ distorted tetrahedra (gray)
• AgS₃ trigonal-planar coordination (green)
• Sulfur (yellow)

For a 3D interactive version on sketchfab, see here:

https://skfb.ly/69Hqz

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Rodalquilarite

• Named after its type locality, the Rodalquilar gold deposit, Almeria, Spain
• Formula: Fe₂(TeO₂OH)₃(TeO₃)Cl
• Space group: P-1 (No. 2)
• Crystal system: triclinic
• Crystal class: -1
• Lattice parameters: a = 5.103 Å, b = 6.653 Å, c = 9.012 Å, α = 73.40, β = 78.03° γ  = 76.76°

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Picture: Christian Rewitzer  | CC BY-SA-3.0

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Crystal structure (click on the picture to download the VESTA file):

(K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,”J. Appl. Crystallogr., 44, 1272-1276 (2011).)

 

• FeO₆ octahedra (brown)
• TeO₃ trigonal pyramids (blue)
• Oxygen (red)
• Hydrogen (white)
• Chlorine (green)

For a 3D interactive version on sketchfab, see here:

https://skfb.ly/69DIu

Pascoite – a mineral with decavanadate anions

Pascoite

• Named after its type locality Pasco Province, Peru
• Formula: Ca₃V₁₀O₂₈ · 17 H₂O
• Space group: C2/m (No. 12)
• Crystal system: monoclinic
• Crystal class: 2/m
• Lattice parameters: a = 19.586 Å, b = 10.141 Å, c = 10.911 Å, α = γ  = 90°, β = 120.815°

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Picture: Rob Lavinsky, iRocks.com – CC-BY-SA-3.0

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Crystal structure (click on the picture to download the VESTA file):

(K. Momma and F. Izumi, “VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data,”J. Appl. Crystallogr., 44, 1272-1276 (2011).)

 

• Clusters of Decavanadate anions [V₁₀O₂₈]^6- (orange)
• CaO₇ polyhedra (blue)
• Oxygen (red)
• Hydrogen (white)

For a 3D interactive version on sketchfab, see here:

https://skfb.ly/696Kr