Meaning of ACANTHITE in English

ACANTHITE

General Information:

Chemical Formula:

Ag2S

Composition:

(Molecular Weight = 247.80 gm)

Silver 87.06 % Ag

Sulfur 12.94 % S

Empirical Formula:

Ag2S

Name Origin:

From the Greek, akanta, meaning "arrow." After the Latin, argentum, meaning "silver". Argentite is stable above 179 C. Acanthite is stable below 179 C.

Physical Properties:

Cleavage:

[001] Poor, [110] Poor

Color:

lead gray, gray, or black.

Density:

7.2 - 7.4, Average = 7.3

Diaphaniety:

Opaque

Habits:

Blocky - Crystal shape tends to be equant (e.g. feldspars)., Skeletal - Crystals form crude outlines with missing faces., Arborescent - "Tree like" growths of branched systems (e.g. s ilver).

Hardness:

2-2.5 - Gypsum-Finger Nail

Luminescence:

None.

Luster:

Metallic

Streak:

shining black

More details...

Mineralogy database English vocab.      Английский словарь базы данных минералогии .