Botryogen Mineral Data

Botryogen Mineral Data +

General Botryogen Information

Chemical Formula:

MgFe+++(SO4)2(OH)·7(H2O)

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

Empirical Formula:

MgFe³⁺(SO₄)₂(OH)·7(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1828

Locality:

Link to MinDat.org Location Data.

Name Origin:

From the Greek, botrys, meaning "grape' and genos, meaning "to yield."

Synonym:

Quetenite

Botryogen Image

Images:

Botryogen

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

Images:

Botryogen

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

Images:

Botryogen Redingtonite

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

Axial Ratios:

a:b:c =0.5885:1:0.3991

Cell Dimensions:

a = 10.5, b = 17.84, c = 7.12, Z = 4; beta = 100.25° V = 1,312.43 Den(Calc)= 2.10

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2₁/n

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 8.87(1), 2.998(0.8), 6.29(0.6),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Suesse P , Naturwissenschaften , 54 (1967) p.139-139, Die kristallstruktur des botryogens, Locality: Quetena, Chile

Physical Properties of Botryogen

Cleavage:

[010] Perfect, [110] Poor

Color:

Hyacinth red, Ocher yellow.

Density:

2 - 2.1, Average = 2.04

Diaphaniety:

Transparent to Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Botryoidal - "Grape-like" rounded forms (e.g.. malachite).

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Reniform - "Kidney like" in shape (e.g.. hematite).

Hardness:

2 - Gypsum

Luminescence:

None.

Luster:

Vitreous (Glassy)

Streak:

ochre yellow

Optical Properties of Botryogen

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

Optical Data:

Biaxial (+), a=1.522, b=1.529, g=1.577, bire=0.0550, 2V(Calc)=44, 2V(Meas)=41. Dispersion none.

Pleochroism (x):

yellow.

Pleochroism (y):

pale red.

Pleochroism (z):

deep orange red.

Calculated Properties of Botryogen

Electron Density:

r_electron=2.15 gm/cc
note: r_Botryogen=2.10 gm/cc.

Fermion Index

Fermion Index = 0.01016
Boson Index = 0.98984

Photoelectric:

PE_Botryogen= 4.98 barns/electron
U=PE_Botryogen x r_electron= 10.72 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Botryogen is Not Radioactive

Botryogen Classification

Dana Class:

31.9.6.1 (31)Hydrated Sulfates Containing Hydroxyl or Halogen

(31.9)where (A+ B++) (XO4) Zq·x(H2O)

(31.9.6)Dana Group

31.9.6.1 Botryogen MgFe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

31.9.6.2 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

31.9.6.3 Xitieshanite Fe(SO4)(OH)·7(H2O) P 2₁/a 2/m

Strunz Class:

VI/D.10-10 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.10 - Copiapite group, Botryogen - Chaidamuite

VI/D.10-10 Botryogen MgFe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-20 Zincobotryogen (Zn,Mg,Mn)Fe(SO4)2(OH)·7(H2O) P 2₁/n 2/m

VI/D.10-30 Calciocopiapite CaFe4(SO4)6(OH)2·19(H2O) P1 1

VI/D.10-40 Magnesiocopiapite MgFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-50 Copiapite FeFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-60 Cuprocopiapite CuFe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-70 Zincocopiapite ZnFe4(SO4)6(OH)2·18(H2O) P1 1

VI/D.10-80 Aluminocopiapite Al2/3Fe4(SO4)6O(OH)2·20(H2O) P1 1

VI/D.10-90 Ferricopiapite Fe2/3Fe4(SO4)6(OH)2·20(H2O) P1 1

VI/D.10-100 Guildite CuFe(SO4)2(OH)·4(H2O) P 2₁/m 2/m

VI/D.10-110 Chaidamuite (Zn,Fe)Fe(SO4)2(OH)·4(H2O) P1 1

Other Botryogen Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

See Also:

Links to other databases for Botryogen :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 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

Search for Botryogen using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Botryogen :
AA Mineral Specimens
A-Rocks Auction
Adams Minerals
B and L Minerals
Dakota Matrix
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Minernet.it
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Botryogen Mineral Data :

Ask about Botryogen here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Botryogen Specimen Label here :

Botryogen

MgFe+++(SO4)2(OH)·7(H2O)
Dana No: 31.9.6.1 Strunz No: VI/D.10-10
Locality:

Notes: