Mineralogy Database

Yavapaiite Mineral Data

Search Webmineral :

General Yavapaiite Information

Help on Chemical  Formula: Chemical Formula: KFe+++(SO4)2
Help on Composition: Composition: Molecular Weight = 287.07 gm
   Potassium  13.62 %  K    16.41 % K2O
   Iron       19.45 %  Fe   27.81 % Fe2O3
   Sulfur     22.34 %  S    55.78 % SO3
   Oxygen     44.59 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: KFe3+(SO4)2
Help on Environment: Environment: Crystal aggregates coating rubble with other secondary sulfates.
Help on IMA Status: IMA Status: Approved IMA 1959
Help on Locality: Locality: United Verde Extension mine, Jerome, Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the Yavapai Indian tribe that inhabited the area of Arizona where the mineral was found.
Help on Name Pronunciation: Name Pronunciation: Yavapaiite + Pronunciation Say YAVAPAIITE

Yavapaiite Image

Click Here for Larger   Image in a New Browser Window Images:
Click Here for Larger   Image


Comments: Translucent pale pinkish-tan colored crystal fragments.
Location: United Verde Mine, Jerome, Verde District, Black Hills (Black Hill Range), Yavapai Co., Arizona, USA. Scale: Fragment Size 1 mm.
© Jeff Weissman / Photographic Guide to Mineral Species

Yavapaiite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.5819:1:1.5286
Help on Cell Dimensions: Cell Dimensions: a = 8.152, b = 5.153, c = 7.877, Z = 2; beta = 94.9° V = 329.68 Den(Calc)= 2.89
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.97(1), 7.85(0.9), 3.87(0.8),

Physical Properties of Yavapaiite

Help on Cleavage: Cleavage: {001} Perfect, {100} Perfect, {110} Distinct
Help on Color: Color: Light pink.
Help on Density: Density: 2.88
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Microscopic Crystals - Crystals visible only with microscopes.
Help on Hardness: Hardness: 2.5-3 - Finger Nail-Calcite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: yellow white

Optical Properties of Yavapaiite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.043 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2278,KPDmeas= 0.2286,KC= 0.2185
Ncalc = 1.63
Help on Optical Data: Optical Data: Biaxial (-), a=1.593, b=1.684, g=1.698, bire=0.1050, 2V(Calc)=40, 2V(Meas)=30. Dispersion r > v strong.

Calculated Properties of Yavapaiite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.84 gm/cc
note: Specific Gravity of Yavapaiite =2.89 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0060301
Boson Index = 0.9939699
Help on Photoelectric: Photoelectric: PEYavapaiite = 8.50 barns/electron
U=PEYavapaiite x relectron= 24.14 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 193.05 (Gamma Ray American Petroleum Institute Units)
Concentration of Yavapaiite per GRapi unit = 0.52 (%)

Estimated Radioactivity from Yavapaiite - barely detectable


Yavapaiite Classification

Help on  Dana Class: Dana Class: (28)Anhydrous Acid and Sulfates
  (28.03)(A++) XO4
  (28.03.04)Dana Group Yavapaiite KFe(SO4)2 C 2/m 2/m Eldfellite NaFe(SO4)2 C 2/m 2/m
Help on  Strunz Class: Strunz Class: 07.AC.15 07 - SULFATES (SELENATES, TELLURATES)
  07.A - Sulfates (selenates, etc.) without Additional Anions, without H2O
  07.AC -With medium-sized and large cations
07.AC.15 Yavapaiite KFe(SO4)2 C 2/m 2/m
07.AC.15 Eldfellite NaFe(SO4)2 C 2/m 2/m

Other Yavapaiite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Yavapaiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Yavapaiite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Yavapaiite :

Ask about Yavapaiite 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 Espaņol

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


Dana No: Strunz No: 07.AC.15





Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.