Secondary mineral in copper arsenate and sulfate mineral assemblage from primary sulfide ores (tennantite, chalcopyrite, and pyrite). Chemically related to mixite.
IMA Status:
Approved IMA 1999 (Dana # Added)
Locality:
Gold Hill mine, Tooele County, Utah, USA. Link to MinDat.org Location Data.
Name Origin:
The name is for Juanita Curtis who found the mineral.
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Physical Properties of Juanitaite
Cleavage:
{001} Perfect, {110} Perfect, {100} Good
Color:
Olive green, Grass green.
Density:
3.61
Diaphaneity:
Translucent
Fracture:
Flexible - Flexible fragments.
Habit:
Microscopic Crystals - Crystals visible only with microscopes.
Habit:
Square - Occurs as square crystals in shape or outline.
Habit:
Tabular - Form dimensions are thin in one direction.
Hardness:
1 - Talc
Luster:
Resinous
Streak:
yellow
Optical Properties of Juanitaite
Gladstone-Dale:
CI meas= -0.123 (Poor) - where the CI = (1-KPDmeas/KC) CI calc= -0.132 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2081,KPDmeas= 0.2064,KC= 0.1838 Ncalc = 1.66
Optical Data:
Uniaxial (-), e=1.705, w=1.785, bire=0.0800.
Calculated Properties of Juanitaite
Electron Density:
Bulk Density (Electron Density)=3.37 gm/cc note: Specific Gravity of Juanitaite =3.61 gm/cc.
Fermion Index:
Fermion Index = 0.0006102547 Boson Index = 0.9993897453
Photoelectric:
PEJuanitaite = 258.60 barns/electron U=PEJuanitaite x rElectron Density= 870.91 barns/cc.
Radioactivity:
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Juanitaite is Not Radioactive
Juanitaite Classification
Dana Class:
42.05.04.01(42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen
Chemical Formula: 
