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Botryogen Mineral Data

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General Botryogen Information

Help on Chemical  Formula: Chemical Formula: MgFe+++(SO4)2(OH)•7(H2O)
Help on Composition: Composition: Molecular Weight = 415.39 gm
   Magnesium   5.85 %  Mg    9.70 % MgO
   Iron       13.44 %  Fe   19.22 % Fe2O3
   Hydrogen    3.64 %  H    32.53 % H2O
   Sulfur     15.44 %  S    38.55 % SO3
   Oxygen     61.63 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: MgFe3+(SO4)2(OH)•7(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1828
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, botrys, meaning "grape' and genos, meaning "to yield."
Help on Name Pronunciation: Name Pronunciation: Botryogen + Pronunciation Say BOTRYOGEN
Help on Synonym: Synonym: Quetenite

Botryogen Image

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Comments: Bright orange botryogen on white calcite showing it's characteristic botryoidal "grape-like" morphology.
Location: Cerro Pintados, Poza Almonte, Pampa del Tamarugal, Chile. Scale: Picture size 1 cm.
© John Veevaert

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Comments: Reddish to yellowish crystalline botryogen.
Location: Redington Mercury Mine, Knoxville, Napa County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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  Redingtonite   Botryogen

Comments: Pale pink granular redingtonite on yellow-brown botryogen.
Location: Redington Mine, Knoxville, Napa County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Botryogen Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5885:1:0.3991
Help on Cell Dimensions: Cell Dimensions: a = 10.5, b = 17.84, c = 7.12, Z = 4; beta = 100.25° V = 1,312.43 Den(Calc)= 2.10
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 8.87(1), 2.998(0.8), 6.29(0.6),

Physical Properties of Botryogen

Help on Cleavage: Cleavage: {010} Perfect, {110} Poor
Help on Color: Color: Hyacinth red, Ocher yellow.
Help on Density: Density: 2 - 2.1, Average = 2.04
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Botryoidal - "Grape-like" rounded forms (e.g.. malachite).
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Habit: Habit: Reniform - "Kidney like" in shape (e.g.. hematite).
Help on Hardness: Hardness: 2 - Gypsum
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: ochre yellow

Optical Properties of Botryogen

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.023 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.001 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2584,KPDmeas= 0.2647,KC= 0.2588
Ncalc = 1.52 - 1.54
Help on Optical Data: Optical Data: Biaxial (+), a=1.522, b=1.529, g=1.577, bire=0.0550, 2V(Calc)=44, 2V(Meas)=41. Dispersion none.
Help on Pleochroism (x): Pleochroism (x): yellow.
Help on Pleochroism (y): Pleochroism (y): pale red.
Help on Pleochroism (z): Pleochroism (z): deep orange red.

Calculated Properties of Botryogen

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.15 gm/cc
note: Specific Gravity of Botryogen =2.10 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBotryogen = 4.98 barns/electron
U=PEBotryogen x rElectron Density= 10.72 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Botryogen is Not Radioactive

Botryogen Classification

Help on  Dana Class: Dana Class: (31)Hydrated Sulfates Containing Hydroxyl or Halogen
  (31.09)where (A+ B++) (XO4) Zq�x(H2O)
  (31.09.06)Botryogen Group Botryogen MgFe(SO4)2(OH)•7(H2O) P 21/n 2/m Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)•7(H2O) P 21/n 2/m Xitieshanite Fe(SO4)(Cl)•7(H2O) P 21/a 2/m
Help on  Strunz Class: Strunz Class: 07.DC.25 07 - SULFATES (SELENATES, TELLURATES)
  07.D - Sulfates (selenates, etc.) with additional anions, with H2O
  07.DC -With only medium-sized cations; chains of corner-sharing octahedra
07.DC.25 Botryogen MgFe(SO4)2(OH)•7(H2O) P 21/n 2/m
07.DC.25 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)•7(H2O) P 21/n 2/m

Other Botryogen Information

Help on References: References: NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Botryogen :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 07.DC.25





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