Modul Kristalografi [k546kj6e8wl8]
SISTEM ORTHORHOMBIC Bagian pertama: menerangkan nilai sumbu a dan ada tiaknya bidang yang tegak lurus terhadap sumbu a tersebut. Bagian ini dinotasikan dengan : ... Orthorombic Brachy Dome, Makro, Basalt Pinacoid a. Membuat perbandingan panjang sumbu a : b : c = 1 : 4 : 6 b. Membuat garis a- / b+ = 30o c. Memberi keterangan pada garis-garisnya ...
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Crystals: Classes and Systems | Minerals | Geology
A typical symbol is (100). Three types of pinacoids are known in the Orthorhombic System. (i) a-Pinacoid or Macropinacoid (100): An open form of two faces, each face cutting the a- axis and being parallel to the other two faces. (ii) b-Pinacoid or Brachy pinacoid (010):
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Donald B Peck
The cross-sectional shape, together with the 4-fold axis of rotational symmetry make minerals reasonably easy to identify with the system. There are of course some …
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Crystal Form, Zones, & Habit
The form {100} is also a pinacoid consisting of the two faces (100) and (00). Similarly the form {010} is a pinacoid consisting of the two faces (010) and (0 0), and the form {001} is a two faced form consisting of the faces (001) and (00). …
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Penuntun Praktikum Kristalografi
Sistem Orthorhombic (prismatic, rhombic, trimetric) ... Orthorombic Brachy Dome, Makro, Basalt Pinacoid a. Membuat perbandingan panjang sumbu a : b : c = 1 : 4 : 6 b. Membuat garis a- / b+ = 30o c. Memberi keterangan pada garis-garisnya seperti tanda a+, a-, b+, b-, c+ dan cd. Membuat proyeksi garis yang merupakan pencerminan 1 bagian a+ dan ae.
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Crystals: Classes and Systems | Minerals | Geology
Three types of pinacoids are found in the Triclinic System also as in the Monoclinic and Orthorhombic systems: (i) a-pinacoid (100) – also called macropinacoid (ii) b-pinacoid (010) – also called brachypinacoid has two faces each meeting the b-axis at unit length.
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RYSTALLOGRAPHY UNIT III Unit -III: SYLLAUS
A dome is defined as forms whose faces essentially meet the vertical axis and are parallel to one of the two horizontal axes. Two types of domes are distinguished:
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External Symmetry of Crystals, 32 Crystal Classes
As stated in the last lecture, there are 32 possible combinations of symmetry operations that define the external symmetry of crystals. These 32 possible combinations result in the 32 …
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Orthorhombic Crystal System III
The other symmetry elements are then implied and we end up with a Form consisting of two horizontal faces parallel to the brachy and macro axis, a Basic Pinacoid. This concludes our …
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Orthorhombic Crystal System II
This concludes our derivation of all the Forms of the Rhombic-pyramidal Crystal Class, by the merohedric approach.. All these Forms can enter in combinations with each other in real crystals. FACIAL APPROACH. We will now derive those same Forms by subjecting the basic faces (compatible with the Orthorhombic Crystal System) one by one to the symmetry operations of …
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Donald B Peck
The cross-sectional shape, together with the 4-fold axis of rotational symmetry make minerals reasonably easy to identify with the system. There are of course some problems. One of them occurs when an Orthorhombic crystal has an …
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Donald B Peck
In the orthorhombic system there is an a or front pinacoid, a b or side pinacoid, and a c or basal pinacoid. In some texts the front pinacoid is called the macro-pinacoid, the side pinacoid is …
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Orthorhombic crystal system | Earth Sciences Museum
Pinacoid: A pinacoid is composed of only two parallel faces. In this case, the top and bottom face are the pinacoid forms (the blue faces). There are a total of three pinacoids in this form.
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IV. ORTHORHOMBIC SYSTEM
ORTHORHOMBIC SYSTEM 125 (102) and o the brachydome (011) ;,m is, as always, the prism (110). Figs. 304-307 and 309 are described a.9 tabular iJ c; Fig. 308 is prismatic in habit in the direction of the macro-axis (b), and 310, 311 prismatic in that of the brachy-axis (a).
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Modul Krismin 2016
Kombinasi Orthorombic Brachy, Makro, Basalt Pinacoid 2. ... 2,2, m, m atau tidak ada SISTEM ORTHORHOMBIC Bagian pertama : Menerangkan nilai sumbu a dan ada tiaknya bidang yang tegak lurus terhadap sumbu a tersebut. ... Orthorombic Brachy Dome, Makro, Basalt Pinacoid Langkah 1 - Membuat perbandingan panjang sumbu a:b: ...
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IV. ORTHORHOMBIC SYSTEM
orthorhombic system 121 The indires of each face are obtained directly by taking these intercepts upon the three horizontal axes in their proper order and by adding a 1 as the fourth figure.
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Donald B Peck
In the orthorhombic system there is an a or front pinacoid, a b or side pinacoid, and a c or basal pinacoid. In some texts the front pinacoid is called the macro-pinacoid, the side pinacoid is named the brachy pinacoid, and the top pinacoid is the basal pinacoid.
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(PDF) Unit 3- Crystal Systems.
Some common forms of orthorhombic system are basal pinacoid; (a) pinacoid, (b) pinacoid and rhombic prism (Fig. 3.23) . There are 3 types of forms in this class.
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Orthorhombic Crystal System I
Like the other pinacoids and all the prisms, the brachy pinacoid is an open Form and can only exist in real crystals when combined with Forms of this Crystal Class such that the combination is a closed structure.
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External Symmetry of Crystals, 32 Crystal Classes
As stated in the last lecture, there are 32 possible combinations of symmetry operations that define the external symmetry of crystals. These 32 possible combinations result in the 32 crystal classes. These are often also referred to as the 32 point groups.
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Orthorhombic Crystal System III
The other symmetry elements are then implied and we end up with a Form consisting of two horizontal faces parallel to the brachy and macro axis, a Basic Pinacoid. This concludes our exposition of the Rhombic-bisphenoidic Crystal Class, and with it our exposition of the Orthorhombic Crystal System .
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Orthorhombic crystal system | Earth Sciences …
Pinacoid: A pinacoid is composed of only two parallel faces. In this case, the top and bottom face are the pinacoid forms (the blue faces). There are a total of three pinacoids in this form.
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Orthorhombic Crystal System III
The face a : b : mc generates a rhombic sphenoid when subjected to the symmetry elements of the present Class : First the face is duplicated by the vertical 2-fold rotation axis, resulting in two upper faces. Then one of the two horizontal 2-fold rotation axes generates for each face a corresponding lower face. The result is a Form consisting of four faces, two upper and two …
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Orthorhombic Crystal System I
Like the other pinacoids and all the prisms, the brachy pinacoid is an open Form and can only exist in real crystals when combined with Forms of this Crystal Class such that the …
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Donald B Peck
In the orthorhombic system there is an a or front pinacoid, a b or side pinacoid, and a c or basal pinacoid. In some texts the front pinacoid is called the macro-pinacoid, the side pinacoid is named the brachy pinacoid, and the top pinacoid is the basal pinacoid. Pedion: A pedion is a single face without a similar face opposite it on the ...
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MODUL Kristalografi
SISTEM ORTHORHOMBIC Bagian pertama: menerangkan nilai sumbu a dan ada tiaknya bidang yang tegak lurus terhadap sumbu a tersebut. Bagian ini dinotasikan dengan : ... Orthorombic Brachy Dome, Makro, Basalt Pinacoid a. Membuat perbandingan panjang sumbu a : b : c = 1 : 4 : 6 b. Membuat garis a- / b+ = 30o c. Memberi keterangan pada garis-garisnya ...
WhatsApp: +86 18221755073