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MINERALOGY (FINALS) - QUIZ ONE > COMPLEX (Properties) > Flashcards

COMPLEX (Properties) Flashcards

1
Q

Distinguishing feature/Alias of Crednerite

A

Strong bireflectance (pale yellow to brownish gray) and Twinning: Mosaic and polysynthetic

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2
Q

Distinguishing feature/Alias of Ulvöspinel

A
  • Commonly occurs as an exsolution product, forming a fine network along {100} in magnetite, or in ilmenite.
  • “Ulvite”
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3
Q

Distinguishing feature/Alias of

A
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4
Q

Distinguishing feature/Alias of Mcconnellite

A

Tabular deep-red rhombohedral crystals (up to 1mm in size)

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5
Q

Distinguishing feature/Alias of Chrysoberyl

A

Hardness, Soft yellowish hues, Conchoidal, Pleochroism

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6
Q

Chemical formula: Fe2Ti3O9
Crystal system: Hexagonal

A

Pseudorutile

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7
Q

Chemical formula: CuCrO2
Crystal system: Trigonal

A

Mcconnellite

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8
Q

Distinguishing feature/Alias of Pseudobrookite

A

black, usually tabular, long primsatic or needle-like (acicular) at times

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9
Q

Distinguishing feature/Alias of Chromite

A

Has a conchoidal or an uneven fracture as well as no distinct cleavage

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10
Q

Distinguishing feature/Alias of Gahnite

A

May show a type of twinning called the Spinel Law
“Zinc Spinel”

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11
Q

Distinguishing feature/Alias of Trevorite

A

Black streaked, infusible and insoluble in most acids.

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12
Q

Chemical formula: FeCr2O4
Crystal system: Isometric

A

Chromite

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13
Q

Distinguishing feature/Alias of Srebrodolskite

A
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14
Q

Chemical formula: ZnAl2O4
Crystal system: Isometric

A

Gahnite

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15
Q

Chemical formula: NiFe2O4
Crystal system: Isometric

A

Trevorite

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16
Q

Chemical formula: Ca2Fe2O5
Crystal system: Orthorhombic

A

Srebrodolskite

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17
Q

Distinguishing feature/Alias of Jacobsite

A

Color: Grayish black or iron black

18
Q

Distinguishing feature/Alias of Zincochromite

A

Brownish-grey in reflected light

19
Q

Distinguishing feature/Alias of Hercynite

A

“Iron Spinel”

20
Q

Distinguishing feature/Alias of Magnetite

A

Black, opaque, magnetic mineral that leaves a black streak when rubbed across a hard rough surface.

21
Q

Distinguishing feature/Alias of Pseudorutile

A

sub-conchoidal and magnetic

22
Q

Chemical formula:
Crystal system:

A
23
Q

Chemical formula: BeAl2O4
Crystal system: Orthorhombic

A

Chrysoberyl

24
Q

Distinguishing feature/Alias of Spinel

A

Octahedral crystal shape

25
Q

Distinguishing feature/Alias of Brownmillerite

A

reddish-brown color and splintery fracture

26
Q

Chemical formula: ZnCr2O4
Crystal system: Isometric

A

Zincochromite

27
Q

Distinguishing feature/Alias of Delafossite

A

Pleochroism (light golden-brown, darker rose-brown)

28
Q

Chemical formula: Ca2(Al,Fe)2O5
Crystal system: Orthorhombic

A

Brownmillerite

29
Q

Chemical formula: Fe2O4
Crystal system: Isometric

A

Magnetite

30
Q

Chemical formula: TiFe2O4
Crystal system: Isometric

A

Ulvöspinel

31
Q

Chemical formula: Fe2TiO5
Crystal system: Orthorhombic

A

Pseudobrookite

32
Q

Distinguishing feature/Alias of Tantalite-(Fe)

A

Iron-black, Splintery, Sub-conchoidal

33
Q

Chemical formula: FeAl2O4
Crystal system: Isometric

A

Hercynite

34
Q

Distinguishing feature/Alias of Magnesiochromite

A

Black and deep red in color; gray in reflected light

35
Q

Distinguishing feature/Alias of Tantalite-(Mn)

A

Strong pleochroism (Red, Orange), Short prismatic to tabular

36
Q

Chemical formula: CuMnO2
Crystal system: Monoclinic

A

Crednerite

37
Q

Chemical formula: FeTa2O6
Crystal system: Orthorhombic

A

Tantalite-(Fe)

38
Q

Chemical formula: MnTa2O6
Crystal system: Orthorhombic

A

Tantalite-(Mn)

39
Q

Chemical formula: MnFe2O4
Crystal system: Isometric

A

Jacobsite

40
Q

Chemical formula: CuFeO2
Crystal system: Trigonal

A

Delafossite

41
Q

Chemical formula: MgCr2O4
Crystal system: Isometric

A

Magnesiochromite

42
Q

Chemical formula: MgAl2O4
Crystal system: Isometric

A

Spinel

MINERALOGY (FINALS) - QUIZ ONE (8 decks)

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